Corvus corax Skull Replica or Common Raven measures 4.7 inches. Common Raven Skull Replica is museum quality polyurethane cast made in USA. 2-part skull (separate cranium and jaw).

The Corvus corax or Common raven is a large all-black passerine bird. It is the most widely distributed of all corvids, found across the Northern Hemisphere.

It is one of the two largest corvids, alongside the thick-billed raven, and is possibly the heaviest passerine bird; at maturity, the Common raven averages 25 inches in length and 3.2 pounds) in mass.

Corvus corax or Common ravens have coexisted with humans for thousands of years and in some areas have been so numerous that people have regarded them as pests.

Part of their success as a species is due to their omnivorous diet; they are extremely versatile and opportunistic in finding sources of nutrition, feeding on carrion, insects, cereal grains, berries, fruit, small animals, nesting birds, and food waste.

The Corvus corax or Common ravens can thrive in varied climates; indeed this species has the largest range of any member of the genus.

They range throughout the Holarctic from Arctic and temperate habitats in North America and Eurasia to the deserts of North Africa, and to islands in the Pacific Ocean.

In the United Kingdom, the common raven’s range is currently increasing. It favors mountainous or coastal terrain, but can also be found in parks with tall trees suitable for use as habitation.

Its population is at its most dense in the north and west of the country, though the species is expanding its population southwards.

Most Corvus corax or Common ravens prefer wooded areas with large expanses of open land nearby, or coastal regions for their nesting sites and feeding grounds.

In some areas of dense human population, such as California in the United States, they take advantage of a plentiful food supply and have seen a surge in their numbers.

On coasts, Corvus corax or Common ravens are often evenly distributed and prefer to build their nest sites along sea cliffs. Common ravens are often located in coastal regions because these areas provide easy access to water and a variety of food sources. Coastal regions have stable weather patterns without extreme cold or hot temperatures.

Corvus corax or common ravens live in a wide array of environments but prefer heavily contoured landscapes. When the environment changes in vast degrees, these birds will respond with a stress response.

The hormone known as corticosterone is activated by the hypothalamic–pituitary–adrenal axis. Corticosterone is activated when the bird is exposed to stress, such as migrating great distances.