Cognitive imitation in 2-year-old children ( Homo sapiens )
Conflict between egg recognition and egg rejection decisions in common cuckoo ( Cuculus canorus ) hosts
Mangabeys ( Cercocebus torquatus lunulatus ) solve the reverse contingency task without a modified procedure
Spatial multiple-choice matching in a harbour seal ( Phoca vitulina )
Token mediated tool exchange between tufted capuchin monkeys ( Cebus apella )
The impact of landmark properties in shaping exploration and navigation
When quantity trumps number
Chimpanzees really know what others can see in a competitive situation
Octopuses ( Octopus bimaculoides ) and cuttlefishes ( Sepia pharaonis , S. officinalis ) can conditionally discriminate
Mental representation of symbols as revealed by vocabulary errors in two bonobos ( Pan paniscus )
Tool-use in a display behaviour by Eurasian beavers ( Castor fiber )