Siberian jays: delayed dispersal in the absence of cooperative breeding / Jan Ekman and Michael Griesser
Western bluebirds: lessons from a marginal cooperative breeder / Janis L. Dickinson, Caglar Akcay, Elise D. Ferree, and Caitlin A. Stern
Long-tailed tits: ecological causes and fitness consequences of redirected helping / Ben J. Hatchwell
Red-cockaded woodpeckers: alternative pathways to breeding success / Jeffrey R. Walters and Victoria Garcia
Florida scrub-jays: oversized territories and group defense in a fire-maintained habitat / John W. Fitzpatrick and Reed Bowman
Carrion crows: family living and helping in a flexible social system / Vittorio Baglione and Daniela Canestrari
Southern pied babblers: the dynamics of conflict and cooperation in a group-living society / Amanda R. Ridley
Superb fairy-wrens: making the worst of a good job / Andrew Cockburn, Lyanne Brouwer, Nicolas Margraf, Helen L. Osmond, and Martijn van de Pol
Chestnut-crowned babblers: dealing with climatic adversity and uncertainty in the Australian arid zone / Andrew F. Russell
Bell miners: kin-selected helping decisions / Jonathan Wright and Paul G. McDonald
Superb starlings: cooperation and confluct in an unpredictable environment / Dustin R. Rubenstein
Seychelles warblers: Complexities of the helping paradox / Jan Komedeur, Terry Burke, Hannah Dugdale, and David S. Richardson
Acorn woodpeckers: helping at the nest, polygynandry, and dependence on a variable acorn crop / Walter D. Koenig, Eric L. Walters, and Joseph Haydock
Taiwan yuhinas: unrelated joint-nesters cooperate in unfavorable environments / Sheng-Feng Shen, Hsiao-Wei Yuan, and Mark Liu
Guira cuckoos: cooperation, infanticide, and female reproductive investment in a joint-nesting species / Regina H. Macedo
Cichlid fishes: a model for the integrative study of social behavior / Michael Taborsky
Meerkats: cooperative breeding in the Kalahari / Tim Clutton-Brock and Marta Manser
Banded mongooses: demography, life history, and social behavior / Michael A. Cant, Hazel J. Nichols, Faye J. Thompson, and Emma Vitakainen
Damaraland and naked mole-rats: convergence of social evolution / Chris G. Faulkes and Nigel C. Bennett
Synthesis: cooperative breeding in the twenty-first century / Walter D. Koenig, Janis L. Dickinson, and Stephen T. Emlen.