Calling site choice and its impact on call degradation and call attractiveness in the gray treefrog, Hyla versicolor Joshua J. SchwartzRaymond HunceKristi Powers Original Article 06 October 2015 Pages: 1 - 19
Presentation order affects decisions made by foraging hummingbirds Kate V. MorganT. Andrew HurlySusan D. Healy Original Article 12 October 2015 Pages: 21 - 26
The placid slavemaker: avoiding detection and conflict as an alternative, peaceful raiding strategy Isabelle KleebergSusanne Foitzik Original Article 06 October 2015 Pages: 27 - 39
Maternal care in a glassfrog: care function and commitment to offspring in Ikakogi tayrona Laura Bravo ValenciaJesse Delia Original Article 15 October 2015 Pages: 41 - 48
Geographic variation in breeding system and environment predicts melanin-based plumage ornamentation of male and female Kentish plovers Araceli Argüelles-TicóClemens KüpperRené E. van Dijk Original Article Open access 24 October 2015 Pages: 49 - 60
More than meets the eye: kinship and social organization in giant otters (Pteronura brasiliensis) Carolina RibasHaydée A. CunhaGuilherme Mourão Original Article 19 October 2015 Pages: 61 - 72
An effective sperm competition avoidance strategy in crabs drives genetic monogamy despite evidence of polyandry Luis M PardoMarcela P. RiverosDavid Veliz Original Article 30 October 2015 Pages: 73 - 81
Coloration in the polymorphic frog Oophaga pumilio associates with level of aggressiveness in intraspecific and interspecific behavioral interactions Sandra P. GaleanoKyle E. Harms Original Article 04 November 2015 Pages: 83 - 97
Metabolism, oxidative stress and territorial behaviour in a female colour polymorphic cichlid fish Peter D. DijkstraMichele E.R. PierottiNeil B. Metcalfe Original Article 04 November 2015 Pages: 99 - 109
Maternal kinship and fisheries interaction influence killer whale social structure R. EstebanP. VerborghR. de Stephanis Original Article 31 October 2015 Pages: 111 - 122
Offspring sex in mountain goat varies with adult sex ratio but only for mothers in good condition Sandra HamelMarco Festa-BianchetSteeve D. Côté Original Article 04 November 2015 Pages: 123 - 132
The relative importance of spatial proximity, kin selection and potential ‘greenbeard’ signals on provisioning behaviour among helpers in a cooperative bird Paul G. McDonaldLee Ann RollinsStephanie Godfrey Original Article 06 November 2015 Pages: 133 - 143
Ants incommunicado: collective decision-making over new nest sites by ants with reduced communication Jonathan P. StuttardDaphna GottliebNigel R. Franks Original Article 13 November 2015 Pages: 145 - 155
Sex-dependent responses to increased parental effort in the pied flycatcher P. E. JärvistöS. CalhimT. Laaksonen Original Article 07 November 2015 Pages: 157 - 169
Barn swallows (Hirundo rustica) differentiate between common cuckoo and sparrowhawk in China: alarm calls convey information on threat Jiangping YuLongwu WangWei Liang Original Article 11 November 2015 Pages: 171 - 178
On plasticity of aggression: influence of past and present predation risk, social environment and sex Gábor HerczegNurul Izza Ab GhaniJuha Merilä Original Article 11 November 2015 Pages: 179 - 187
Sexual segregation when foraging in an extremely social killer whale population Amber BeermanErin AsheRob Williams Original Article 13 November 2015 Pages: 189 - 198
Territorial clashes in the Neotropical butterfly Actinote pellenea (Acraeinae): do disputes differ when contests get physical? M. R. M. CarvalhoP. E. C. PeixotoW. W. Benson Original Article 27 November 2015 Pages: 199 - 207
Why patterns of assortative mating are key to study sexual selection and how to measure them Grant C. McDonaldTommaso Pizzari Methods Open access 27 November 2015 Pages: 209 - 220