Watching the best nutcrackers: what capuchin monkeys (Cebus apella) know about others’ tool-using skills Eduardo B. OttoniBriseida Dogo de ResendePatrícia Izar Original Article 18 February 2005 Pages: 215 - 219
Piagetian conservation of discrete quantities in bonobos (Pan paniscus), chimpanzees (Pan troglodytes), and orangutans (Pongo pygmaeus) Chikako SudaJosep Call Original Article 04 February 2005 Pages: 220 - 235
Means-means-end tool choice in cotton-top tamarins (Saguinus oedipus): finding the limits on primates’ knowledge of tools Laurie R. SantosAlexandra RosatiMarc D. Hauser Original Article 25 January 2005 Pages: 236 - 246
Analog number representations in mongoose lemurs (Eulemur mongoz): evidence from a search task Kerrie P. LewisSarah JaffeElizabeth M. Brannon Original Article 20 January 2005 Pages: 247 - 252
Expectations about numerical events in four lemur species (Eulemur fulvus, Eulemur mongoz, Lemur catta and Varecia rubra) Laurie R. SantosJennifer L. BarnesNeha Mahajan Original Article 24 February 2005 Pages: 253 - 262
Chimpanzee (Pan troglodytes) intentional communication is not contingent upon food Jamie L. RussellStephanie BracciniWilliam D. Hopkins Original Article 02 March 2005 Pages: 263 - 272
Post-choice information processing by pigeons Tracy I. MartinThomas R. Zentall Original Article 03 March 2005 Pages: 273 - 278
