Male chacma baboons (Papio hamadryas ursinus) discriminate loud call contests between rivals of different relative ranks Dawn M. KitchenDorothy L. CheneyRobert M. Seyfarth Original Article 26 May 2004 Pages: 1 - 6
Integration of spatial maps in pigeons Aaron P. BlaisdellRobert G. Cook Original Article 24 June 2004 Pages: 7 - 16
Bottlenose dolphin (Tursiops truncatus) calves appear to model their signature whistles on the signature whistles of community members Deborah FrippCaryn OwenPeter Tyack Original Article 24 June 2004 Pages: 17 - 26
Cuttlefish (Sepia officinalis: Cephalopoda) hunting behavior and associative learning Patricia D. ColeShelley A. Adamo Original Article 11 August 2004 Pages: 27 - 30
Imitation recognition in a captive chimpanzee (Pan troglodytes) Mark NielsenEmma Collier-BakerThomas Suddendorf Original Article 21 August 2004 Pages: 31 - 36
Dogs (Canis lupus familiaris) fail to show understanding of means-end connections in a string-pulling task Britta OsthausStephen E. G. LeaAlan M. Slater Original Article 26 August 2004 Pages: 37 - 47
Preliminary observations of tool use in captive hyacinth macaws (Anodorhynchus hyacinthinus) Andressa BorsariEduardo B. Ottoni Short Communication 10 July 2004 Pages: 48 - 52
Categorization and abstraction abilities in 3-year-old children: a comparison with monkey data Dalila BovetJacques VauclairAgnès Blaye Short Communication 05 August 2004 Pages: 53 - 59
The perception of causality in chimpanzees (Pan spp.) Sanjida O’ConnellR. I. M. Dunbar Short Communication 19 August 2004 Pages: 60 - 66
