The last several decades of research on avian cognition have revealed surprising parallels
between the abilities of birds—most notably corvids—and great apes. Parrots, albeit far less …

Pioneering research on avian behaviour and cognitive neuroscience have highlighted that
avian species, mainly corvids and parrots, have a cognitive tool kit comparable with apes …

Despite prolonged interest in comparing brain size and behavioral proxies of
'intelligence'across taxa, the adaptive and cognitive significance of brain size variation …

Humans use a variety of cues to infer an object's weight, including how easily objects can be
moved. For example, if we observe an object being blown down the street by the wind, we …

The classic Aesop's fable, Crow and the Pitcher, has inspired a major line of research in
comparative cognition. Over the past several years, five articles (over 32 experiments) have …

Extant primates, especially chimpanzees, are often used as models for pre-modern hominin
(henceforth: hominin) behaviour, anatomy and cognition. In particular, as hominin behaviour …

Highlights•Tests of 'Aesop's fable'present subjects with functional vs nonfunctional
choices.•Results may suggest that some corvids understand properties of water …

Behavioral flexibility is considered an important trait for adapting to environmental change,
but it is unclear what it is, how it works, and whether it is a problem solving ability. I …

Psittacines, along with corvids, are commonly referred to as 'feathered apes' due to their
advanced cognitive abilities. Until rather recently, the research effort on parrot cognition was …

To gain a better understanding of the evolution of animal cognition, it is necessary to test
and compare the cognitive abilities of a broad array of taxa. Meaningful inter-species …