Simple and integrated detours: field tests with Columbian ground squirrels Anna Pavlovna NesterovaFrank Hansen Original Paper 25 April 2009 Pages: 655 - 670
An analysis of immediate serial recall performance in a macaque Matthew M. BotvinickJun WangJames C. Houk Original Paper 22 May 2009 Pages: 671 - 678
Decision making and visibility in cats (Felis catus) in a progressive elimination task Dominique Dorais PagéClaude Dumas Original Paper 29 May 2009 Pages: 679 - 692
Horse (Equus caballus) whinnies: a source of social information Alban LemassonAnaïs BoutinMartine Hausberger Original Paper 18 May 2009 Pages: 693 - 704
Conformism in the food processing techniques of white-faced capuchin monkeys (Cebus capucinus) Susan Perry Original Paper Open access 20 May 2009 Pages: 705 - 716
Olfactory self-recognition in a cichlid fish Timo ThünkenNadine WaltschykHarald Kullmann Original Paper 22 May 2009 Pages: 717 - 724
Recognition of a 3D snake model and its 2D photographic image by captive black tufted-ear marmosets (Callithrix penicillata) Nally EmileMarilia Barros Original Paper 18 May 2009 Pages: 725 - 732
Horses (Equus caballus) select the greater of two quantities in small numerical contrasts Claudia UllerJennifer Lewis Short Communication 23 April 2009 Pages: 733 - 738
Domestic cats (Felis catus) do not show causal understanding in a string-pulling task Emma WhittMarie DouglasIan Hocking Short Communication 18 May 2009 Pages: 739 - 743
Learning, memorizing and apparent forgetting of chemical cues from new predators by Iberian green frog tadpoles Adega GonzaloPilar LópezJosé Martín Short Communication 18 May 2009 Pages: 745 - 750
How great is great ape foresight? Thomas SuddendorfMichael C. CorballisEmma Collier-Baker Commentary 30 June 2009 Pages: 751 - 754
