The Common Raven (Corvus corax), also known as the Northern Raven, is a large all-black bird in the crow family, a relative of theMagpie and the Mynah bird. Found across the northern hemisphere. it is the most widely distributed of all corvids..

A collective noun for a group of ravens (or at least the Common Raven) is an "unkindness". However, in practice, most people use the more generic term flock, and sometimes more macabre terms such as "swarm" or "horde."

A mature Common Raven is between 56 and 69 cm (22 to 27 inches) in length, with a wingspan of 115 to 130 cm (45 to 51 in). Recorded weights range from 0.69 to 1.63 kg (1.5 to 3.6 lb),[19] making it one of the heaviest passerines.

The bill is large and slightly curved. It has a longish, strongly graduated tail, mostly black iridescent plumage, and a dark brown iris. The throat feathers are elongated and pointed and the bases of the neck feathers are pale brownish-grey. Juvenile plumage is similar but duller with a blue-grey iris.

Apart from its greater size, the Common Raven differs from its cousins, the crows, by having a larger and heavier beak, a shaggy throat, and a wedge-shaped tail.

The species has a distinctive, deep, hollow pruk-pruk-pruk call, which to experienced listeners is unlike that of any other corvid. Its very wide and complex vocabulary includes a high, knocking toc-toc-toc, a dry, grating kraa, a low guttural rattle and some calls of an almost musical nature.

Common Ravens can be very long-lived, especially in captive or protected conditions; individuals at the Tower of London have lived for more than 40 years. Lifespans in the wild are considerably shorter: typically only 10 to 15 years. The longest known lifespan of a banded wild Common Raven was 13 years. .

The Common Raven has coexisted with humans for thousands of years, and in some areas has been so successful that it is considered a pest. Part of its success comes from its omnivorous diet; Common Ravens are extremely versatile and opportunistic in finding sources of nutrition, feeding on carrion, insects and food waste, in addition to cereal grains, berries, fruit and small animals.

Some remarkable feats of problem-solving have been observed in the species, leading to the belief that it is highly intelligent. Over the centuries, it has been the subject of mythology, folklore, art and literature. In many indigenous cultures, including those of Scandinavia, ancient Ireland and Wales, Bhutan, the northwest coast of North America, Siberia and northeast Asia, the Common Raven has been revered as a spiritual figure or god.