Within-group variation in sociality has been linked to correlates of fitness across vertebrates.
Individuals that form strong social bonds with a few partners, or are well integrated into a …

Birds are some of the most diverse organisms on Earth, with species inhabiting a wide
variety of niches across every major biome. As such, birds are vital to our understanding of …

The ability to manipulate objects with limbs has evolved repeatedly among land tetrapods.
Several selective forces have been proposed to explain the emergence of forelimb …

Only a handful of bird species are known to use foraging tools in the wild. Amongst them, the
New Caledonian crow (Corvus moneduloides) stands out with its sophisticated tool-making …

Animals (including humans) use objects to solve problems or accomplish goals in diverse
ways. Sometimes while doing so they achieve a mechanical effect on a target object or …

The avian beak is a multipurpose organ playing a vital role in a variety of functions, including
feeding, drinking, playing, grasping objects, mating, nesting, preening and defence against …

When tested under laboratory conditions, Goffin's cockatoos (Cacatua goffiniana)
demonstrate numerous sophisticated cognitive skills. Most importantly, this species has …

The emergence of flexible tool use is rare in the animal kingdom and thought to be largely
constrained by either cognitive ability or ecological factors. That mostly birds with a high …

The physical properties of genuine and deliberate facial expressions remain elusive. This
study focuses on observable dynamic differences between genuine and deliberate …

The cumulative modification of tool designs over time is a crucial development for
technological evolution. Cognitive-related prerequisites for this technological capability are …