1. Male chacma baboons (Papio hamadryas ursinus) discriminate loud call contests between rivals of different relative ranks

   • Dawn M. Kitchen
   • Dorothy L. Cheney
   • Robert M. Seyfarth

   Original Article 26 May 2004 Pages: 1 - 6

   

2. Integration of spatial maps in pigeons

   • Aaron P. Blaisdell
   • Robert G. Cook

   Original Article 24 June 2004 Pages: 7 - 16

   

3. Bottlenose dolphin (Tursiops truncatus) calves appear to model their signature whistles on the signature whistles of community members

   • Deborah Fripp
   • Caryn Owen
   • Peter Tyack

   Original Article 24 June 2004 Pages: 17 - 26

   

4. Cuttlefish (Sepia officinalis: Cephalopoda) hunting behavior and associative learning

   • Patricia D. Cole
   • Shelley A. Adamo

   Original Article 11 August 2004 Pages: 27 - 30

   

5. Imitation recognition in a captive chimpanzee (Pan troglodytes)

   • Mark Nielsen
   • Emma Collier-Baker
   • Thomas Suddendorf

   Original Article 21 August 2004 Pages: 31 - 36

   

6. Dogs (Canis lupus familiaris) fail to show understanding of means-end connections in a string-pulling task

   • Britta Osthaus
   • Stephen E. G. Lea
   • Alan M. Slater

   Original Article 26 August 2004 Pages: 37 - 47

   

7. Preliminary observations of tool use in captive hyacinth macaws (Anodorhynchus hyacinthinus)

   • Andressa Borsari
   • Eduardo B. Ottoni

   Short Communication 10 July 2004 Pages: 48 - 52

   

8. Categorization and abstraction abilities in 3-year-old children: a comparison with monkey data

   • Dalila Bovet
   • Jacques Vauclair
   • Agnès Blaye

   Short Communication 05 August 2004 Pages: 53 - 59

   

9. The perception of causality in chimpanzees (Pan spp.)

   • Sanjida O’Connell
   • R. I. M. Dunbar

   Short Communication 19 August 2004 Pages: 60 - 66