Male chacma baboons ( Papio hamadryas ursinus ) discriminate loud call contests between rivals of different relative ranks
Integration of spatial maps in pigeons
Bottlenose dolphin ( Tursiops truncatus ) calves appear to model their signature whistles on the signature whistles of community members
Cuttlefish ( Sepia officinalis
Imitation recognition in a captive chimpanzee ( Pan troglodytes )
Dogs ( Canis lupus familiaris ) fail to show understanding of means-end connections in a string-pulling task
Preliminary observations of tool use in captive hyacinth macaws ( Anodorhynchus hyacinthinus )
Categorization and abstraction abilities in 3-year-old children
The perception of causality in chimpanzees ( Pan spp.)