Chicks prefer to peck at insect-like elongated stimuli moving in a direction orthogonal to their longer axis Elena ClaraLucia RegolinLesley J. Rogers Original Paper 23 May 2009 Pages: 755 - 765
Memory for what, where, and when in the black-capped chickadee (Poecile atricapillus) Miranda C. FeeneyWilliam A. RobertsDavid F. Sherry Original Paper 23 May 2009 Pages: 767 - 777
Visual and response-based navigation in the tortoise (Geochelone carbonaria) Anna WilkinsonSacha CowardGeoffrey Hall Original Paper 23 May 2009 Pages: 779 - 787
Comparing dogs and great apes in their ability to visually track object transpositions Eveline F. RooijakkersJuliane KaminskiJosep Call Original Paper Open access 27 May 2009 Pages: 789 - 796
Forest chimpanzees (Pan troglodytes verus) remember the location of numerous fruit trees Emmanuelle NormandSimone Dagui BanChristophe Boesch Original Paper Open access 31 May 2009 Pages: 797 - 807
The comparative psychophysics of complex shape perception J. David SmithJoshua S. RedfordSarah M. Haas Original Paper 03 June 2009 Pages: 809 - 821
Influence of social conditions in song sharing in the adult canary Katia LehongreThierry AubinCatherine Del Negro Original Paper 04 June 2009 Pages: 823 - 832
Do dogs (Canis familiaris) show contagious yawning? Aimee L. HarrValerie R. GilbertKimberley A. Phillips Short Communication 19 May 2009 Pages: 833 - 837
