1. Thinking about thinking: how Donald R. Griffin (1915–2003) remade animal behavior

   • James L. Gould

   Obituary 19 December 2003 Pages: 1 - 4

2. New evidence of animal consciousness

   • Donald R. Griffin
   • Gayle B. Speck

   Review 05 December 2003 Pages: 5 - 18

3. Tufted capuchins (Cebus apella) attribute value to foods and tools during voluntary exchanges with humans

   • Gregory C. Westergaard
   • Chanya Liv
   • Stephen J. Suomi

   Original Article 19 July 2003 Pages: 19 - 24

   

4. How do rhesus monkeys (Macaca mulatta) scan faces in a visual paired comparison task?

   • Katalin M. Gothard
   • Cynthia A. Erickson
   • David G. Amaral

   Original Article 09 July 2003 Pages: 25 - 36

   

5. Western scrub-jays (Aphelocoma californica) use cognitive strategies to protect their caches from thieving conspecifics

   • Nathan J. Emery
   • Joanna M. Dally
   • Nicola S. Clayton

   Original Article 26 June 2003 Pages: 37 - 43

   

6. Reciprocal recognition of sifaka (Propithecus verreauxi verreauxi) and redfronted lemur (Eulemur fulvus rufus) alarm calls

   • Claudia Fichtel

   Original Article 26 June 2003 Pages: 45 - 52

   

7. Representation of two geometric features of the environment in the domestic chick (Gallus gallus)

   • Luca Tommasi
   • Camilla Polli

   Original Article 23 July 2003 Pages: 53 - 59

   

8. Oddity learning by African dwarf goats ( Capra hircus)

   • Evgeny Roitberg
   • Hartmut Franz

   Original Article 10 September 2003 Pages: 61 - 67