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 …

In recent years, increasingly interdisciplinary exchanges have demonstrated how scientific
knowledge of captive cognition and behaviour can prove valuable for informing …

Contrafreeloading—working to access food that could be freely obtained—is rarely exhibited
and poorly understood. Based on data from Grey parrots (Psittacus erithacus), researchers …

Tooling is associated with complex cognitive abilities, occurring most regularly in large-
brained mammals and birds. Among birds, self-care tooling is seemingly rare in the wild …

Macphail famously criticized two foundational assumptions that underlie the evolutionary
approach to comparative psychology: that there are differences in intelligence across …

A key question in the field of animal cognition is how animals comprehend their physical
world. Object permanence is one of the fundamental features of physical cognition. It is the …

Naïve individuals of some bird species can rapidly solve vertical string-pulling tasks with
virtually no errors. This has led to various hypotheses being proposed which suggest that …

Visually tracking a moving object, even if it becomes temporarily invisible, is an important
skill for animals living in complex environments. However, this ability has not been widely …

Kea (Nestor notabilis) are a large-brained and highly social species of parrot adapted to
living in the New Zealand alps. Both their ecology and evolutionary history suggest this …

Macphail famously criticized two foundational assumptions that underlie the evolutionary
approach to comparative psychology: that there are differences in intelligence across …