(a) Publications
85. Bourne, A.R., Cunningham, S.J., Spottiswoode, C.N. & Ridley, A.R. (in press). Hot droughts compromise interannual survival across all group sizes in a cooperatively breeding bird. Ecology Letters.
84. Dutour, M., Walsh, S.L. & Ridley, A.R. (in press). Australian magpies adjust their alarm calls according to predator distance. Bioacoustics.
83. Bourne, A.R., Cunningham, S.J., Spottiswoode, C.N. & Ridley, A.R. 2020. High temperatures drive offspring mortality in a cooperatively breeding bird. Proceedings of the Royal Society Series B - Biological Sciences 287: 20201140.
82. Bourne, A.R., Cunningham, S.J., Spottiswoode, C.N. & Ridley, A.R. 2020. Compensatory breeding in years following drought in a desert-dwelling cooperative breeder. Frontiers in Ecology and Evolution 8:190. www.frontiersin.org/articles/10.3389/fevo.2020.00190/abstract
81. Dutour, M & Ridley, A.R. 2020. Females sing more often and at higher frequencies than males in Australian magpies. Behavioural Processes 172, 104045.
80. Mirville, M.O., Ridley, A.R., Samedi, J.P.M., Vecellio, V., Ndagijimana, F., Stoinski. T. & Grueter, C.C. 2020. Intragroup behavioural changes following intergroup conflict in mountain gorillas (Gorilla beringei beringei). International Journal of Primatology 41, 382-400.
79. Soh, M.C.K., Peh, K.S-H., Mitchell, N.J., Ridley, A.R., Butler, C.W. & Puan, C.L. 2019. Impacts of habitat degradation on tropical montane biodiversity and ecosystem services: a systematic map for identifying future research priorities. Frontiers in Forestry and Global Change 2:83 www.frontiersin.org/articles/10.3389/ffgc.2019.00083/full
78. Matthews, J.K., Ridley, A.R., Kaplin, B. & Grueter, C.C 2020. A comparison of the efficacy of fecal sampling and direct feeding observations for quantifying the diet of a frugivorous primate. Current Zoology 66, 333-343.
77. Ashton, B.J., Thornton, A. & Ridley, A.R. 2019. Larger group sizes facilitate the emergence and spread of innovations in a group-living bird. Animal Behaviour 158, 1-7.
76. Silvestri, A.J., Morgan, K. & Ridley, A.R. 2019. The association between evidence of a predator threat and responsiveness to alarm calls in Western Australian magpies (Cracticus tibicen dorsalis). PeerJ 7 e7572
75. Ridley, A.R. & Nelson-Flower, M.J. (in press). Understanding the trade-off between cooperation and conflict in avian societies. In: Cooperation and conflict: biological mechanisms at the interface. Edited by Walter Wilcyzinski and Sarah F. Brosnan. Cambridge University Press, Cambridge, UK.
74. Matthews, J.K., Ridley, A.R., Niyigaba, P., Kaplin, B. & Grueter, C.C. 2019. Chimpanzee feeding ecology and fallback food use in the montane forest of Nyungwe National Park, Rwanda. American Journal of Primatology 82, e22971.
73. Pike, K.N., Ashton, B.J., Morgan, K. & Ridley, A.R. 2019. Social and morphological factors influence variation in offspring care in the cooperatively breeding Western Australian magpie. Frontiers in Ecology & Evolution. www.frontiersin.org/articles/10.3389/fevo.2019.00092/full
72. Ridley, A.R & Mirville, M.O. 2019. Utilising the research on intergroup conflict in non-human animals can help inform patterns of human intergroup conflict. Behavioral & Brain Sciences 42.
71. Walsh, S.L., Townsend, S.W. & Ridley, A.R. 2019. Investigating the potential for call combinations in a life-long vocal learner. Ethology 125, 362-368.
70. Jepsen, E.M., Ganswindt, A., Ngcamphalala, C.A., Bourne, A.R., Ridley, A.R. & McKechnie, A.E. 2019. Non-invasive monitoring of physiological stress in an Afrotropical arid-zone passerine bird, the southern pied babbler. General & Comparative Endocrinology 276, 60-68.
69. Bourne, A.R., McKechnie, A.E., Cunningham, S.J., Ridley, A.R., Woodborne, S.P. & Karasov, W. 2019. Non‐invasive measurement of metabolic rates in wild, free‐living birds using doubly labelled water. Functional Ecology 33, 162-174.
68. Ashton, B.J., Ridley, A.R. & Thornton, A. 2019. Smarter through group living: A response to Smulders. Learning & Behaviour, 47(4), 277-279.
67. Mirville, M.O., Ridley, A.R., Samedi, J.P.M., Vecellio, V., Ndagijimana, F., Stoinski, T.S. & Grueter, C.C. 2018. Factors influencing individual participation during intergroup interactions in mountain gorillas. Animal Behaviour 144, 75–86.
66. Mirville, M.O., Ridley, A.R., Samedi, J.P.M., Vecellio, V., Ndagijimana, F., Stoinski, T.S. & Grueter, C.C. 2018. Low familiarity and similar‘group strength’ between opponents increase the intensity of intergroup interactions in mountain gorillas (Gorilla beringei beringei)’, Behavioural Ecology and Sociobiology 72 11, doi:10.1007/s00265-018-2592-5
65. Ashton, B.J., Thornton, A. & Ridley, A.R. 2018. An intraspecific appraisal of the social intelligence hypothesis. Philosophical Transactions of the Royal Society of London Series B 317, 20170288.
64. Engesser, S., Ridley, A.R., Manser, M.B., Manser, A. & Townsend, S.W. 2018. Internal acoustic structuring of pied babbler recruitment cries specifies the form of recruitment. Behavioral Ecology 29, 1021-1030.
63. Wiley, E.M. & Ridley, A.R. 2018. The benefits of pair bond tenure in the cooperatively breeding pied babbler (Turdoides bicolor). Ecology and Evolution 8, 7178-7185
62. Ridley, A.R. & Mirville, M.O. 2018. The importance of understanding costs and benefits: a commentary on Christensen & Radford. Behavioral Ecology
61. Nelson-Flower, M.J., Flower, T.P. & Ridley, A.R. 2018. Sex differences in the drivers of reproductive skew in a cooperative breeder. Molecular Ecology 27, 2435-2446.
60. Nelson-Flower, M.J., Wiley, E., Flower, T.P. & Ridley, A.R. 2018. Individual dispersal decisions in a cooperative breeder: ecological constraints, the benefits of philopatry, and the social queue for dominance. Journal of Animal Ecology 87, 1227-1238
59. Ashton, B.J., Ridley, A.R., Edwards, E. & Thornton, A.N. 2018. Cognitive performance is linked to group size and affects fitness in Australian magpies. Nature 25503/doi:10.1038.
58. Engesser, S., Ridley, A.R. & Townsend, S.W. 2017. Element repetition rates encode functionally distinct information in pied babbler ‘clucks’ and ‘purrs’. Animal Cognition 20, 953-960.
57. Nelson-Flower, M.J. & Ridley, A.R. 2016. Nepotism and subordinate tenure in a cooperative breeder. Biology Letters 12(8) 20160365
56. Humphries, D.J. Finch, F.M., Bell, M.B.V. & Ridley, A.R. 2016. Vocal cues to identity: pied babblers produce individually distinct but not stable loud calls. Ethology 122, 609-619. onlinelibrary.wiley.com/doi/10.1111/eth.12508/full
55. Engesser, S., Ridley, A.R. & Townsend, S.W. 2016. Meaningful call combinations and compositional processing in the southern pied babbler. Proceedings of the National Academy of Sciences 113, 5976-5981 www.pnas.org/content/113/21/5976.abstract
54. Wiley, E.M. & Ridley, A.R. 2016. The effects of temperature on offspring provisioning in a cooperative breeder. Animal Behaviour 117, 187-195 www.sciencedirect.com/science/article/pii/S0003347216300653
53. Keynan, O & Ridley, A.R. 2016. Component, group and demographic Allee effects in a cooperatively breeding bird species, the Arabian babbler (Turdoides squamiceps). Oecologia 182, 153-161 link.springer.com/article/10.1007/s00442-016-3656-8
52. Keynan, O, Ridley, A.R. & Lotem, A. 2016. Task-dependent differences in learning by subordinate and dominant wild Arabian babblers. Ethology 122, 399-410.
51. Ridley, A.R. 2016. Southern pied babblers: the dynamics of conflict and cooperation in a group living society. in Cooperative breeding: studies of ecology, evolution and behaviour (Koenig, W.D. & Dickinson, J.S. eds). Cambridge University Press. Pp 115-132.
50. Mirville, M.O., Kelley, J.L., Ridley, A.R. 2016. Group size and associative learning in the Australian magpie (Cracticus tibicen dorsalis). Behavioral Ecology & Sociobiology 70, 417-427. Link
49. Ridley, A.R., Humphries, D.J. & Wiley, E.M. 2015. Is information from both quality signalling and social recognition really redundant? A commentary on Sheehan & Bergman. (Invited Commentary). Behavioral Ecology. Link
48. Nelson-Flower, M.J. & Ridley, A.R. 2015. Male-male competition is not costly to dominant males in a cooperatively breeding bird. Behavioral Ecology & Sociobiology 69, 1997-2004 .Link
47. Humphries, D.J., Finch, F.M., Bell, M.B.V. & Ridley, A.R. 2015. Calling where it counts: subordinate pied babblers target the audience of their vocal advertisements. PLoS One 10(7) e0130795. Link
46. Edwards, E. K., Mitchell, N.J. & Ridley, A.R. 2015. The impact of high temperatures on foraging behaviour and body condition in the Western Australian Magpie Cracticus tibicen dorsalis. Ostrich - Journal of African Ornithology (Special Edition in memory of Prof Phil Hockey) 86, 137-144. Link
45. Ridley, A.R. & Ashton, B.J. 2015. The benefits of an evolutionary framework for the investigation of teaching behaviour, and why the emphasis should be taken off humans as a benchmark. (Invited commentary). Behavioral and Brain Sciences.
44. Keynan, O., Ridley, A.R. & Lotem, A. 2015. Social foraging strategies and acquisition of a novel foraging skill in a cooperative breeder. Behavioral Ecology 26, 207-214. Link
43. Flower, T.P., Gribble, M. & Ridley, A.R. 2014. Deception by flexible alarm mimicry in an African bird. Science 344, 513-516. Link
42. Ridley, A.R., Wiley, E.M. & Thompson, A.M. 2014. The ecological benefits of interceptive eavesdropping. Functional Ecology 28, 197-205. Link Lay summary
41. Thompson, A.M. Ridley, A.R., Hockey, P.A.R., Finch, F.M., Britton, A. & Raihani, N.J. 2013. The influence of siblings on begging behaviour. Animal Behaviour 86: 811-819. Link
40. Nelson-Flower, M.J., Hockey, P.A.R., O’Ryan, C., English, S., Thompson, A.M., Bradley, K., Rose, R. & Ridley, A.R. 2013. Costly reproductive competition between females in a monogamous cooperatively breeding bird. Proceedings of the Royal Society of London Series B – Biological Sciences 280, 20130728. Link.
39. Thompson, A.M., Raihani, N.J., Hockey, P.A.R., Britton, A., Finch F. & Ridley, A.R. 2013. The influence of fledgling location on adult provisioning: a test of the blackmail hypothesis. Proceedings of the Royal Society of London Series B - Biological Sciences 280, 20130558. Link
38. Ridley, A.R., Nelson-Flower, M.J. & Thompson, A.M. 2013. Is sentinel behaviour safe? An experimental investigation. Animal Behaviour 85, 137-142. Link
37. Thompson, A.M. & Ridley, A.R. 2013. Do fledglings choose wisely? An experimental investigation into social foraging behaviour. Behavioral Ecology & Sociobiology 67, 69-78. Link
36. Ridley, A.R. & van den Heuvel, I.M. 2012. Is there a difference in reproductive performance between cooperative and non-cooperative species? A southern African comparison. Behaviour 149, 821-848. Link
35. Child, M.F., Flower, T.P. & Ridley, A.R. 2012. Investigating a link between bill morphology, foraging ecology and kleptoparasitic behaviour in the fork-tailed drongo Dicrurus adsimilis. Animal Behaviour 84, 1013-1022. Link
34. Flower, T.P., Child, M.F. & Ridley, A.R. 2013. The ecological economics of kleptoparasitism: payoffs from self-foraging versus kleptoparasitism. Journal of Animal Ecology 82, 245-255. Link
33. du Plessis, K.L., Martin, R.O., Hockey, P.A.R., Cunningham, S.J.C. & Ridley, A.R. 2012. The costs of keeping cool in a warming world: implications of high temperatures for foraging, thermoregulation and body condition of an arid-zone bird. Global Change Biology 18, 3063-3070. Link
32. Nelson-Flower, M.J., Hockey, P.A.R., O’Ryan, C. & Ridley, A.R. 2012. Inbreeding avoidance mechanisms: dispersal dynamics in cooperatively breeding pied babblers. Journal of Animal Ecology 81, 875-882. Link
31. Mzumara, T.I., Hockey, P.A.R. & Ridley, A.R. 2012. Re-assessment of the conservation status of the endangered yellow-throated apalis, Apalis flavigularis, of Malawi. Bird Conservation International 22, 184-192. Link
30. Golabek, K.A., Ridley, A.R. & Radford, A.N. 2012. Food availability affects strength of seasonal territorial behaviour in a cooperatively breeding bird. Animal Behaviour 83, 613-619. Link
29. Ridley, A.R. & Thompson, A.M. 2012. The effect of Jacobin cuckoo parasitism on the body mass and survival of young in a new host species. Ibis 154, 195-199. Link
28. Ridley, A.R. 2012. Invading together: the benefits of coalition dispersal in a cooperative bird. Behavioral Ecology & Sociobiology 66, 77-83. Link
27. Hollén, L.I., Bell, M.B.V., Wade, H.M., Rose, R., Russell, A., Niven, F., Ridley, A.R. & Radford, A.N. 2011. Ecological conditions influence sentinel decisions. Animal Behaviour 82, 1435-1441. Link
26. Hollén, L.I., Bell, M.B.V., Russell, A., Niven, F., Ridley, A.R., Radford, A.N. 2011 Calling by concluding sentinels: coordinating cooperation or revealing risk? PLoS One 6(10):e25010 (doi:10.1371/journal.pone.0025010). Link
25. Nelson-Flower, M.J., Hockey, P., O’Ryan, C. Raihani, N., du Plessis, M. & Ridley,A.R. 2011. Monogamous dominant pairs monopolize reproduction in the cooperatively breeding pied babbler. Behavioral Ecology 22, 559-565. Link
24. Ridley, A.R. & Thompson, A.M. 2011. Heterospecific egg destruction by wattled starlings and the impact on pied babbler reproductive success. Ostrich 82, 201-205. Link
23. Hockey, P.A.R., Sirami, C., Ridley, A.R., Midgley, G.F. & Babiker, H.A. 2011. Interrogating recent range changes in South African birds: confounding signals from land-use and climate change represent a challenge for attribution. Diversity & Distributions 17, 254-261. Link
22. Radford, A.N., Hollén, L.I., Bell, M.B.V. & Ridley, A.R. 2011 . Singing for your supper: sentinel calling by kleptoparasites can mitigate the costs to victims. Evolution 65, 900-906. Link
21. Ridley, A.R., Raihani, N.J. & Bell, M. B.V. 2010. Experimental evidence that sentinel behaviour is affected by risk. Biology Letters 6, 445-448. Link
20. Raihani, N.J., Nelson-Flower, M.J., Browning, L.E. & Ridley, A.R. 2010. Routes to breeding in cooperatively breeding pied babblers. Journal of Avian Biology 41, 681-686. Link
19. Bell, M.B.V., Radford, A.N., Smith, R.A., Thompson, A.M. & Ridley, A.R. 2010. Bargaining babblers: vocal negotiation of cooperative behaviour in a social bird. Proceedings of the Royal Society of London Series B – Biological Sciences 277, 3223-3228. Link
18. Raihani, N.J., Nelson-Flower, M.J., Browning, L.E., Moyes, K. & Ridley, A.R. 2010. Synchronous provisioning increases brood survival in cooperatively breeding pied babblers. Journal of Animal Ecology 79, 44-52. Link
17. Ridley, A.R. & Child, M.F. 2009. Specific targeting of host individuals by a kleptoparasitic bird. Behavioral Ecology & Sociobiology 63, 1119-1126. Link
16. Bell, M.B.V., Radford, A.N., Rose, R., Wade, H., & Ridley, A.R. 2009. The value of constant surveillance in a risky environment. Proceedings of the Royal Society of London Series B – Biological Sciences 276, 2997-3005. Link
15. Ridley, A.R. & Raihani, N.J. 2008. Task partitioning increases reproductive output in a cooperative bird. Behavioral Ecology 19, 1136-1142. Link
14. Raihani, N.J., Ridley, A.R., Browning, L.E. & Nelson-Flower, M.J. 2008. Juvenile female aggression in cooperatively breeding pied babblers: causes and contexts. Ethology 114, 452-458. Link
13. Radford, A.N. & Ridley, A.R. 2008. Close-calling regulates spacing between foraging competitors in the group-living pied babbler. Animal Behaviour 75, 519-527. Link
12. Ridley, A.R., Raihani, N.J & Nelson-Flower, M.J. 2008. The cost of being alone: the fate of floaters in a population of cooperatively breeding pied babblers. Journal of Avian Biology 39, 389-392. Link
11. Raihani, N.J. & Ridley, A.R. 2008. Experimental evidence for teaching in wild pied babblers. Animal Behaviour 75, 3-11. Link
10. Raihani, N.J & Ridley, A.R. 2008 . Parental aggression against dependent young results in task partitioning in a cooperative bird. Biology Letters 4, 24-26. Link
9. Ridley, A.R. 2007. Factors affecting offspring survival and development in a cooperative bird: social, maternal and environmental effects. Journal of Animal Ecology 76, 750-760. Link
8. Radford, A.N. & Ridley, A.R. 2007. Individuals in foraging groups may use vocal cues when assessing their need for anti-predator vigilance. Biology Letters 3, 249-252. Link
7. Ridley, A.R. & Huyvaert, K.P. 2007. Sex-biased preferential care in the cooperatively breeding Arabian babbler. Journal of Evolutionary Biology 20, 1271-1276. Link
6. Ridley, A.R., Child, M.F & Bell, M.B.V. 2007. Interspecific audience effects on the alarm-calling behaviour of a kleptoparasitic bird. Biology Letters 3, 589-591. Link
5. Raihani, N.J. & Ridley, A.R. 2007. Variable fledging age according to group size: tradeoffs in a cooperative bird. Biology Letters 3, 624-627. Link
4. Ridley, A.R & Raihani, N.J. 2007. Variable post-fledging care in a cooperative bird: causes and consequences. Behavioral Ecology 18, 994-1000. Link
3. Raihani, N.J. & Ridley, A.R. 2007. Adult vocalisations during provisioning: offspring responses and post-fledging benefits in wild pied babblers. Animal Behaviour 74, 1303-1309. Link
2. Ridley, A.R. & Raihani, N.J. 2007. Facultative response to a kleptoparasite by the cooperatively breeding pied babbler. Behavioral Ecology 18, 324-330. Link
1. Radford, A.N. & Ridley, A.R. 2006. Recruitment calling: a novel form of extended parental care in an altricial species. Current Biology 16, 1700-1704. Link
(b) Magazine articles
5. Ridley, A.R. 2011. Stealing the neighbours’ kids: kidnapping behaviour in social species. Wild Magazine
4. Ridley, A.R. 2011. Are you being fooled? Older birds are less likely to be deceived by cuckoos. Wild Magazine http://www.wildcard.co.za/blog.htm?action=view-post&id=2318
3. Ridley, A.R. & Thompson, A.M. 2010. Dominatricks: reproductive conflict between female southern pied babblers. Africa Birds & Birding 15, 30-34.
2. Ridley A.R & Raihani, N.J. 2007. Artful dodgers: the social dynamics of need and greed. Africa Birds & Birding 12, 56-59.
1. Ridley, A.R. 2006. Going gangbusters: group dynamics in pied babblers. Africa Birds & Birding 11, 50-57.
85. Bourne, A.R., Cunningham, S.J., Spottiswoode, C.N. & Ridley, A.R. (in press). Hot droughts compromise interannual survival across all group sizes in a cooperatively breeding bird. Ecology Letters.
84. Dutour, M., Walsh, S.L. & Ridley, A.R. (in press). Australian magpies adjust their alarm calls according to predator distance. Bioacoustics.
83. Bourne, A.R., Cunningham, S.J., Spottiswoode, C.N. & Ridley, A.R. 2020. High temperatures drive offspring mortality in a cooperatively breeding bird. Proceedings of the Royal Society Series B - Biological Sciences 287: 20201140.
82. Bourne, A.R., Cunningham, S.J., Spottiswoode, C.N. & Ridley, A.R. 2020. Compensatory breeding in years following drought in a desert-dwelling cooperative breeder. Frontiers in Ecology and Evolution 8:190. www.frontiersin.org/articles/10.3389/fevo.2020.00190/abstract
81. Dutour, M & Ridley, A.R. 2020. Females sing more often and at higher frequencies than males in Australian magpies. Behavioural Processes 172, 104045.
80. Mirville, M.O., Ridley, A.R., Samedi, J.P.M., Vecellio, V., Ndagijimana, F., Stoinski. T. & Grueter, C.C. 2020. Intragroup behavioural changes following intergroup conflict in mountain gorillas (Gorilla beringei beringei). International Journal of Primatology 41, 382-400.
79. Soh, M.C.K., Peh, K.S-H., Mitchell, N.J., Ridley, A.R., Butler, C.W. & Puan, C.L. 2019. Impacts of habitat degradation on tropical montane biodiversity and ecosystem services: a systematic map for identifying future research priorities. Frontiers in Forestry and Global Change 2:83 www.frontiersin.org/articles/10.3389/ffgc.2019.00083/full
78. Matthews, J.K., Ridley, A.R., Kaplin, B. & Grueter, C.C 2020. A comparison of the efficacy of fecal sampling and direct feeding observations for quantifying the diet of a frugivorous primate. Current Zoology 66, 333-343.
77. Ashton, B.J., Thornton, A. & Ridley, A.R. 2019. Larger group sizes facilitate the emergence and spread of innovations in a group-living bird. Animal Behaviour 158, 1-7.
76. Silvestri, A.J., Morgan, K. & Ridley, A.R. 2019. The association between evidence of a predator threat and responsiveness to alarm calls in Western Australian magpies (Cracticus tibicen dorsalis). PeerJ 7 e7572
75. Ridley, A.R. & Nelson-Flower, M.J. (in press). Understanding the trade-off between cooperation and conflict in avian societies. In: Cooperation and conflict: biological mechanisms at the interface. Edited by Walter Wilcyzinski and Sarah F. Brosnan. Cambridge University Press, Cambridge, UK.
74. Matthews, J.K., Ridley, A.R., Niyigaba, P., Kaplin, B. & Grueter, C.C. 2019. Chimpanzee feeding ecology and fallback food use in the montane forest of Nyungwe National Park, Rwanda. American Journal of Primatology 82, e22971.
73. Pike, K.N., Ashton, B.J., Morgan, K. & Ridley, A.R. 2019. Social and morphological factors influence variation in offspring care in the cooperatively breeding Western Australian magpie. Frontiers in Ecology & Evolution. www.frontiersin.org/articles/10.3389/fevo.2019.00092/full
72. Ridley, A.R & Mirville, M.O. 2019. Utilising the research on intergroup conflict in non-human animals can help inform patterns of human intergroup conflict. Behavioral & Brain Sciences 42.
71. Walsh, S.L., Townsend, S.W. & Ridley, A.R. 2019. Investigating the potential for call combinations in a life-long vocal learner. Ethology 125, 362-368.
70. Jepsen, E.M., Ganswindt, A., Ngcamphalala, C.A., Bourne, A.R., Ridley, A.R. & McKechnie, A.E. 2019. Non-invasive monitoring of physiological stress in an Afrotropical arid-zone passerine bird, the southern pied babbler. General & Comparative Endocrinology 276, 60-68.
69. Bourne, A.R., McKechnie, A.E., Cunningham, S.J., Ridley, A.R., Woodborne, S.P. & Karasov, W. 2019. Non‐invasive measurement of metabolic rates in wild, free‐living birds using doubly labelled water. Functional Ecology 33, 162-174.
68. Ashton, B.J., Ridley, A.R. & Thornton, A. 2019. Smarter through group living: A response to Smulders. Learning & Behaviour, 47(4), 277-279.
67. Mirville, M.O., Ridley, A.R., Samedi, J.P.M., Vecellio, V., Ndagijimana, F., Stoinski, T.S. & Grueter, C.C. 2018. Factors influencing individual participation during intergroup interactions in mountain gorillas. Animal Behaviour 144, 75–86.
66. Mirville, M.O., Ridley, A.R., Samedi, J.P.M., Vecellio, V., Ndagijimana, F., Stoinski, T.S. & Grueter, C.C. 2018. Low familiarity and similar‘group strength’ between opponents increase the intensity of intergroup interactions in mountain gorillas (Gorilla beringei beringei)’, Behavioural Ecology and Sociobiology 72 11, doi:10.1007/s00265-018-2592-5
65. Ashton, B.J., Thornton, A. & Ridley, A.R. 2018. An intraspecific appraisal of the social intelligence hypothesis. Philosophical Transactions of the Royal Society of London Series B 317, 20170288.
64. Engesser, S., Ridley, A.R., Manser, M.B., Manser, A. & Townsend, S.W. 2018. Internal acoustic structuring of pied babbler recruitment cries specifies the form of recruitment. Behavioral Ecology 29, 1021-1030.
63. Wiley, E.M. & Ridley, A.R. 2018. The benefits of pair bond tenure in the cooperatively breeding pied babbler (Turdoides bicolor). Ecology and Evolution 8, 7178-7185
62. Ridley, A.R. & Mirville, M.O. 2018. The importance of understanding costs and benefits: a commentary on Christensen & Radford. Behavioral Ecology
61. Nelson-Flower, M.J., Flower, T.P. & Ridley, A.R. 2018. Sex differences in the drivers of reproductive skew in a cooperative breeder. Molecular Ecology 27, 2435-2446.
60. Nelson-Flower, M.J., Wiley, E., Flower, T.P. & Ridley, A.R. 2018. Individual dispersal decisions in a cooperative breeder: ecological constraints, the benefits of philopatry, and the social queue for dominance. Journal of Animal Ecology 87, 1227-1238
59. Ashton, B.J., Ridley, A.R., Edwards, E. & Thornton, A.N. 2018. Cognitive performance is linked to group size and affects fitness in Australian magpies. Nature 25503/doi:10.1038.
58. Engesser, S., Ridley, A.R. & Townsend, S.W. 2017. Element repetition rates encode functionally distinct information in pied babbler ‘clucks’ and ‘purrs’. Animal Cognition 20, 953-960.
57. Nelson-Flower, M.J. & Ridley, A.R. 2016. Nepotism and subordinate tenure in a cooperative breeder. Biology Letters 12(8) 20160365
56. Humphries, D.J. Finch, F.M., Bell, M.B.V. & Ridley, A.R. 2016. Vocal cues to identity: pied babblers produce individually distinct but not stable loud calls. Ethology 122, 609-619. onlinelibrary.wiley.com/doi/10.1111/eth.12508/full
55. Engesser, S., Ridley, A.R. & Townsend, S.W. 2016. Meaningful call combinations and compositional processing in the southern pied babbler. Proceedings of the National Academy of Sciences 113, 5976-5981 www.pnas.org/content/113/21/5976.abstract
54. Wiley, E.M. & Ridley, A.R. 2016. The effects of temperature on offspring provisioning in a cooperative breeder. Animal Behaviour 117, 187-195 www.sciencedirect.com/science/article/pii/S0003347216300653
53. Keynan, O & Ridley, A.R. 2016. Component, group and demographic Allee effects in a cooperatively breeding bird species, the Arabian babbler (Turdoides squamiceps). Oecologia 182, 153-161 link.springer.com/article/10.1007/s00442-016-3656-8
52. Keynan, O, Ridley, A.R. & Lotem, A. 2016. Task-dependent differences in learning by subordinate and dominant wild Arabian babblers. Ethology 122, 399-410.
51. Ridley, A.R. 2016. Southern pied babblers: the dynamics of conflict and cooperation in a group living society. in Cooperative breeding: studies of ecology, evolution and behaviour (Koenig, W.D. & Dickinson, J.S. eds). Cambridge University Press. Pp 115-132.
50. Mirville, M.O., Kelley, J.L., Ridley, A.R. 2016. Group size and associative learning in the Australian magpie (Cracticus tibicen dorsalis). Behavioral Ecology & Sociobiology 70, 417-427. Link
49. Ridley, A.R., Humphries, D.J. & Wiley, E.M. 2015. Is information from both quality signalling and social recognition really redundant? A commentary on Sheehan & Bergman. (Invited Commentary). Behavioral Ecology. Link
48. Nelson-Flower, M.J. & Ridley, A.R. 2015. Male-male competition is not costly to dominant males in a cooperatively breeding bird. Behavioral Ecology & Sociobiology 69, 1997-2004 .Link
47. Humphries, D.J., Finch, F.M., Bell, M.B.V. & Ridley, A.R. 2015. Calling where it counts: subordinate pied babblers target the audience of their vocal advertisements. PLoS One 10(7) e0130795. Link
46. Edwards, E. K., Mitchell, N.J. & Ridley, A.R. 2015. The impact of high temperatures on foraging behaviour and body condition in the Western Australian Magpie Cracticus tibicen dorsalis. Ostrich - Journal of African Ornithology (Special Edition in memory of Prof Phil Hockey) 86, 137-144. Link
45. Ridley, A.R. & Ashton, B.J. 2015. The benefits of an evolutionary framework for the investigation of teaching behaviour, and why the emphasis should be taken off humans as a benchmark. (Invited commentary). Behavioral and Brain Sciences.
44. Keynan, O., Ridley, A.R. & Lotem, A. 2015. Social foraging strategies and acquisition of a novel foraging skill in a cooperative breeder. Behavioral Ecology 26, 207-214. Link
43. Flower, T.P., Gribble, M. & Ridley, A.R. 2014. Deception by flexible alarm mimicry in an African bird. Science 344, 513-516. Link
42. Ridley, A.R., Wiley, E.M. & Thompson, A.M. 2014. The ecological benefits of interceptive eavesdropping. Functional Ecology 28, 197-205. Link Lay summary
41. Thompson, A.M. Ridley, A.R., Hockey, P.A.R., Finch, F.M., Britton, A. & Raihani, N.J. 2013. The influence of siblings on begging behaviour. Animal Behaviour 86: 811-819. Link
40. Nelson-Flower, M.J., Hockey, P.A.R., O’Ryan, C., English, S., Thompson, A.M., Bradley, K., Rose, R. & Ridley, A.R. 2013. Costly reproductive competition between females in a monogamous cooperatively breeding bird. Proceedings of the Royal Society of London Series B – Biological Sciences 280, 20130728. Link.
39. Thompson, A.M., Raihani, N.J., Hockey, P.A.R., Britton, A., Finch F. & Ridley, A.R. 2013. The influence of fledgling location on adult provisioning: a test of the blackmail hypothesis. Proceedings of the Royal Society of London Series B - Biological Sciences 280, 20130558. Link
38. Ridley, A.R., Nelson-Flower, M.J. & Thompson, A.M. 2013. Is sentinel behaviour safe? An experimental investigation. Animal Behaviour 85, 137-142. Link
37. Thompson, A.M. & Ridley, A.R. 2013. Do fledglings choose wisely? An experimental investigation into social foraging behaviour. Behavioral Ecology & Sociobiology 67, 69-78. Link
36. Ridley, A.R. & van den Heuvel, I.M. 2012. Is there a difference in reproductive performance between cooperative and non-cooperative species? A southern African comparison. Behaviour 149, 821-848. Link
35. Child, M.F., Flower, T.P. & Ridley, A.R. 2012. Investigating a link between bill morphology, foraging ecology and kleptoparasitic behaviour in the fork-tailed drongo Dicrurus adsimilis. Animal Behaviour 84, 1013-1022. Link
34. Flower, T.P., Child, M.F. & Ridley, A.R. 2013. The ecological economics of kleptoparasitism: payoffs from self-foraging versus kleptoparasitism. Journal of Animal Ecology 82, 245-255. Link
33. du Plessis, K.L., Martin, R.O., Hockey, P.A.R., Cunningham, S.J.C. & Ridley, A.R. 2012. The costs of keeping cool in a warming world: implications of high temperatures for foraging, thermoregulation and body condition of an arid-zone bird. Global Change Biology 18, 3063-3070. Link
32. Nelson-Flower, M.J., Hockey, P.A.R., O’Ryan, C. & Ridley, A.R. 2012. Inbreeding avoidance mechanisms: dispersal dynamics in cooperatively breeding pied babblers. Journal of Animal Ecology 81, 875-882. Link
31. Mzumara, T.I., Hockey, P.A.R. & Ridley, A.R. 2012. Re-assessment of the conservation status of the endangered yellow-throated apalis, Apalis flavigularis, of Malawi. Bird Conservation International 22, 184-192. Link
30. Golabek, K.A., Ridley, A.R. & Radford, A.N. 2012. Food availability affects strength of seasonal territorial behaviour in a cooperatively breeding bird. Animal Behaviour 83, 613-619. Link
29. Ridley, A.R. & Thompson, A.M. 2012. The effect of Jacobin cuckoo parasitism on the body mass and survival of young in a new host species. Ibis 154, 195-199. Link
28. Ridley, A.R. 2012. Invading together: the benefits of coalition dispersal in a cooperative bird. Behavioral Ecology & Sociobiology 66, 77-83. Link
27. Hollén, L.I., Bell, M.B.V., Wade, H.M., Rose, R., Russell, A., Niven, F., Ridley, A.R. & Radford, A.N. 2011. Ecological conditions influence sentinel decisions. Animal Behaviour 82, 1435-1441. Link
26. Hollén, L.I., Bell, M.B.V., Russell, A., Niven, F., Ridley, A.R., Radford, A.N. 2011 Calling by concluding sentinels: coordinating cooperation or revealing risk? PLoS One 6(10):e25010 (doi:10.1371/journal.pone.0025010). Link
25. Nelson-Flower, M.J., Hockey, P., O’Ryan, C. Raihani, N., du Plessis, M. & Ridley,A.R. 2011. Monogamous dominant pairs monopolize reproduction in the cooperatively breeding pied babbler. Behavioral Ecology 22, 559-565. Link
24. Ridley, A.R. & Thompson, A.M. 2011. Heterospecific egg destruction by wattled starlings and the impact on pied babbler reproductive success. Ostrich 82, 201-205. Link
23. Hockey, P.A.R., Sirami, C., Ridley, A.R., Midgley, G.F. & Babiker, H.A. 2011. Interrogating recent range changes in South African birds: confounding signals from land-use and climate change represent a challenge for attribution. Diversity & Distributions 17, 254-261. Link
22. Radford, A.N., Hollén, L.I., Bell, M.B.V. & Ridley, A.R. 2011 . Singing for your supper: sentinel calling by kleptoparasites can mitigate the costs to victims. Evolution 65, 900-906. Link
21. Ridley, A.R., Raihani, N.J. & Bell, M. B.V. 2010. Experimental evidence that sentinel behaviour is affected by risk. Biology Letters 6, 445-448. Link
20. Raihani, N.J., Nelson-Flower, M.J., Browning, L.E. & Ridley, A.R. 2010. Routes to breeding in cooperatively breeding pied babblers. Journal of Avian Biology 41, 681-686. Link
19. Bell, M.B.V., Radford, A.N., Smith, R.A., Thompson, A.M. & Ridley, A.R. 2010. Bargaining babblers: vocal negotiation of cooperative behaviour in a social bird. Proceedings of the Royal Society of London Series B – Biological Sciences 277, 3223-3228. Link
18. Raihani, N.J., Nelson-Flower, M.J., Browning, L.E., Moyes, K. & Ridley, A.R. 2010. Synchronous provisioning increases brood survival in cooperatively breeding pied babblers. Journal of Animal Ecology 79, 44-52. Link
17. Ridley, A.R. & Child, M.F. 2009. Specific targeting of host individuals by a kleptoparasitic bird. Behavioral Ecology & Sociobiology 63, 1119-1126. Link
16. Bell, M.B.V., Radford, A.N., Rose, R., Wade, H., & Ridley, A.R. 2009. The value of constant surveillance in a risky environment. Proceedings of the Royal Society of London Series B – Biological Sciences 276, 2997-3005. Link
15. Ridley, A.R. & Raihani, N.J. 2008. Task partitioning increases reproductive output in a cooperative bird. Behavioral Ecology 19, 1136-1142. Link
14. Raihani, N.J., Ridley, A.R., Browning, L.E. & Nelson-Flower, M.J. 2008. Juvenile female aggression in cooperatively breeding pied babblers: causes and contexts. Ethology 114, 452-458. Link
13. Radford, A.N. & Ridley, A.R. 2008. Close-calling regulates spacing between foraging competitors in the group-living pied babbler. Animal Behaviour 75, 519-527. Link
12. Ridley, A.R., Raihani, N.J & Nelson-Flower, M.J. 2008. The cost of being alone: the fate of floaters in a population of cooperatively breeding pied babblers. Journal of Avian Biology 39, 389-392. Link
11. Raihani, N.J. & Ridley, A.R. 2008. Experimental evidence for teaching in wild pied babblers. Animal Behaviour 75, 3-11. Link
10. Raihani, N.J & Ridley, A.R. 2008 . Parental aggression against dependent young results in task partitioning in a cooperative bird. Biology Letters 4, 24-26. Link
9. Ridley, A.R. 2007. Factors affecting offspring survival and development in a cooperative bird: social, maternal and environmental effects. Journal of Animal Ecology 76, 750-760. Link
8. Radford, A.N. & Ridley, A.R. 2007. Individuals in foraging groups may use vocal cues when assessing their need for anti-predator vigilance. Biology Letters 3, 249-252. Link
7. Ridley, A.R. & Huyvaert, K.P. 2007. Sex-biased preferential care in the cooperatively breeding Arabian babbler. Journal of Evolutionary Biology 20, 1271-1276. Link
6. Ridley, A.R., Child, M.F & Bell, M.B.V. 2007. Interspecific audience effects on the alarm-calling behaviour of a kleptoparasitic bird. Biology Letters 3, 589-591. Link
5. Raihani, N.J. & Ridley, A.R. 2007. Variable fledging age according to group size: tradeoffs in a cooperative bird. Biology Letters 3, 624-627. Link
4. Ridley, A.R & Raihani, N.J. 2007. Variable post-fledging care in a cooperative bird: causes and consequences. Behavioral Ecology 18, 994-1000. Link
3. Raihani, N.J. & Ridley, A.R. 2007. Adult vocalisations during provisioning: offspring responses and post-fledging benefits in wild pied babblers. Animal Behaviour 74, 1303-1309. Link
2. Ridley, A.R. & Raihani, N.J. 2007. Facultative response to a kleptoparasite by the cooperatively breeding pied babbler. Behavioral Ecology 18, 324-330. Link
1. Radford, A.N. & Ridley, A.R. 2006. Recruitment calling: a novel form of extended parental care in an altricial species. Current Biology 16, 1700-1704. Link
(b) Magazine articles
5. Ridley, A.R. 2011. Stealing the neighbours’ kids: kidnapping behaviour in social species. Wild Magazine
4. Ridley, A.R. 2011. Are you being fooled? Older birds are less likely to be deceived by cuckoos. Wild Magazine http://www.wildcard.co.za/blog.htm?action=view-post&id=2318
3. Ridley, A.R. & Thompson, A.M. 2010. Dominatricks: reproductive conflict between female southern pied babblers. Africa Birds & Birding 15, 30-34.
2. Ridley A.R & Raihani, N.J. 2007. Artful dodgers: the social dynamics of need and greed. Africa Birds & Birding 12, 56-59.
1. Ridley, A.R. 2006. Going gangbusters: group dynamics in pied babblers. Africa Birds & Birding 11, 50-57.
Other publications (PhD students)
(a) Peer-reviewed publications
Keynan, O. & Yosef, R. 2010. Temporal changes and sexual differences of impaling behavior in Southern Grey Shrike (Lanius meridionalis). Behavioral Processes 85, 47-51.
Keynan, O. & Yosef, R. 2010. Annual precipitation affects reproductive success of the Southern Grey Shrike (Lanius meridionalis). The Wilson Journal of Ornithology 122(2), 334-339.
Turner, E.C., Granroth, M.V., Johnson, H.R., Thompson, A.M., Froy, H., German, R.N. & Holdgate, R. 2009. Habitat preference and dispersal of the Duke of Burgundy butterfly (Hamearis lucina) on an abandoned chalk quarry in Bedfordshire, UK. Journal of Insect Conservation 13, 475-486.
(b) Magazine articles
Keynan, O. & Leshem, Y. 2009 (in Hebrew) Bird migration along the Dead Sea Rift: Science-Environment-Tourism-Education. Salt of the Earth- a series for Dead Sea studies 4, 56-76.
Babbler research theses (completed)
Wiley, E.M. 2017. Examining how multilevel population dynamics and climate influence breeding behaviour, within-group stability and demography in a cooperatively breeding bird. PhD thesis, University of Western Australia.
Engesser, S. 2017. Vocal combinations in the Southern pied babbler (Turdoides bicolour) and the chestnut-crowned babbler (Pomatostomus ruficeps): implications for the evolution of human language. PhD thesis, Zurich University.
Westrip, J.S. 2016. Organisation and development of anti-predator behaviour in a cooperative breeder. PhD thesis, Edinburgh University.
Keynan, O. 2015. Effect of group size and composition on individual behavior, group dynamics and population regulation in the Arabian Babbler (Turdoides squamiceps). PhD thesis, Macquarie University & Tel Aviv University (co-tutelle).
Humphries, D.J. 2013. The mechanisms and function of social recognition in the cooperatively breeding southern pied babbler, Turdoides bicolor. PhD thesis, Macquarie University
Thompson. A.M. 2013. Post-fledgling begging and development in southern pied babblers (Turdoides bicolor). PhD thesis, University of Cape Town
du Plessis, K.L. 2011. Heat tolerance of southern pied babblers in the Kalahari desert - how will they respond to climate change? MSc thesis, University of Cape Town.
Golabek, K.A. 2011. Vocal communication and the facilitation of social behaviour in the southern pied babbler (Turdoides bicolor). PhD thesis, University of Bristol.
Nelson-Flower, M.J. 2010. Kinship and its consequences in the cooperatively breeding southern pied babbler (Turdoides bicolor). PhD thesis, University of Cape Town.
Raihani, N.J. 2008. Cooperation and conflict in pied babblers. PhD thesis, Cambridge University.
Stephenson, J. 2007. Is bigger necessarily better? The influence of weight on breeding success. Hons thesis, University of Cape Town.
Child, M.F. 2006. Cunning kleptoparasitism: dynamic strategies to obtain food rewards. Hons thesis, University of Cape Town.
Lyons, C. 2006. The effect of environmental versus social factors on changes in territory size in the pied babbler. Hons thesis, University of Cape Town.
Ridley, A.R. 2003. The causes and consequences of helping behaviour in the cooperatively breeding Arabian babbler. PhD thesis, Cambridge University.
Engesser, S. 2017. Vocal combinations in the Southern pied babbler (Turdoides bicolour) and the chestnut-crowned babbler (Pomatostomus ruficeps): implications for the evolution of human language. PhD thesis, Zurich University.
Westrip, J.S. 2016. Organisation and development of anti-predator behaviour in a cooperative breeder. PhD thesis, Edinburgh University.
Keynan, O. 2015. Effect of group size and composition on individual behavior, group dynamics and population regulation in the Arabian Babbler (Turdoides squamiceps). PhD thesis, Macquarie University & Tel Aviv University (co-tutelle).
Humphries, D.J. 2013. The mechanisms and function of social recognition in the cooperatively breeding southern pied babbler, Turdoides bicolor. PhD thesis, Macquarie University
Thompson. A.M. 2013. Post-fledgling begging and development in southern pied babblers (Turdoides bicolor). PhD thesis, University of Cape Town
du Plessis, K.L. 2011. Heat tolerance of southern pied babblers in the Kalahari desert - how will they respond to climate change? MSc thesis, University of Cape Town.
Golabek, K.A. 2011. Vocal communication and the facilitation of social behaviour in the southern pied babbler (Turdoides bicolor). PhD thesis, University of Bristol.
Nelson-Flower, M.J. 2010. Kinship and its consequences in the cooperatively breeding southern pied babbler (Turdoides bicolor). PhD thesis, University of Cape Town.
Raihani, N.J. 2008. Cooperation and conflict in pied babblers. PhD thesis, Cambridge University.
Stephenson, J. 2007. Is bigger necessarily better? The influence of weight on breeding success. Hons thesis, University of Cape Town.
Child, M.F. 2006. Cunning kleptoparasitism: dynamic strategies to obtain food rewards. Hons thesis, University of Cape Town.
Lyons, C. 2006. The effect of environmental versus social factors on changes in territory size in the pied babbler. Hons thesis, University of Cape Town.
Ridley, A.R. 2003. The causes and consequences of helping behaviour in the cooperatively breeding Arabian babbler. PhD thesis, Cambridge University.
Other species research theses (completed)
Matthews, J.K. 2019. Ecological and social factors influencing the diet and grouping behaviour of chimpanzees in a montane forest environment (Pan troglodytes shweinfurthii). PhD thesis, University of Western Australia.
Soh, M.C.K. 2019. Effects of environmental change on montane amphibians and birds in peninsular Malaysia. PhD thesis, University of Western Australia.
Mirville, M.O. 2018. The causes and consequences of intergroup interactions in mountain gorillas (Gorilla beringei beringei). University of Western Australia.
Ashton, B. 2017. The causes and consequences of individual variation in cognitive ability in the cooperatively breeding Australian magpie (Cracticus tibicen dorsalis). PhD thesis, University of Western Australia.
Mirville, M.O. 2013. The effect of group size on innovative learning behaviour in the cooperative Australian magpie. Hons thesis, University of Western Australia.
Wong, Q. 2014. Are artificial hollows a good management tool for Carnaby's cockatoo? A comparison of microclimates in artificial versus natural hollows. Hons thesis, University of Western Australia.
Edwards, E. 2014. The impacts of heat on foraging effort and reproductive behaviour in Australian magpies (Cracticus tibicen dorsalis). Hons thesis, University of Western Australia.
Matthews, J.K. 2019. Ecological and social factors influencing the diet and grouping behaviour of chimpanzees in a montane forest environment (Pan troglodytes shweinfurthii). PhD thesis, University of Western Australia.
Soh, M.C.K. 2019. Effects of environmental change on montane amphibians and birds in peninsular Malaysia. PhD thesis, University of Western Australia.
Mirville, M.O. 2018. The causes and consequences of intergroup interactions in mountain gorillas (Gorilla beringei beringei). University of Western Australia.
Ashton, B. 2017. The causes and consequences of individual variation in cognitive ability in the cooperatively breeding Australian magpie (Cracticus tibicen dorsalis). PhD thesis, University of Western Australia.
Mirville, M.O. 2013. The effect of group size on innovative learning behaviour in the cooperative Australian magpie. Hons thesis, University of Western Australia.
Wong, Q. 2014. Are artificial hollows a good management tool for Carnaby's cockatoo? A comparison of microclimates in artificial versus natural hollows. Hons thesis, University of Western Australia.
Edwards, E. 2014. The impacts of heat on foraging effort and reproductive behaviour in Australian magpies (Cracticus tibicen dorsalis). Hons thesis, University of Western Australia.
