Leading a conspecific away from food in ravens ( Corvus corax )?
Testing for social learning and imitation in common marmosets, Callithrix jacchus , using an artificial fruit
Long-term retention of the differential values of Arabic numerals by chimpanzees ( Pan troglodytes )
Event memory and misinformation effects in a gorilla ( Gorilla gorilla gorilla )
Comparative and categorical spatial judgments in the monkey
Global-feature classification can be acquired more rapidly than local-feature classification in both humans and pigeons
Direct observations of pandanus-tool manufacture and use by a New Caledonian crow ( Corvus moneduloides )
Selection of tool diameter by New Caledonian crows Corvus moneduloides
Visual discrimination of normal and drug induced behavior in quails ( Coturnix coturnix japonica )