In North America, common ravens are found across Canada and Alaska, southward through the Appalachians and throughout most of the Western U.S. Able to adapt to a wide range of habitats, these large, aggressive, hardy corvids are identified by their large size, thick bills, heavy build, diamond-shaped tail and deep, croaking calls.
Unlike their smaller cousins, American crows, which often move about in flocks, common ravens are generally observed alone or in pairs, often harassing hawks, owls and other perceived enemies. Their diet consists of invertebrates, nestlings, eggs, amphibians, reptiles, small mammals, carrion, food waste and berries; in other words, they are not picky eaters. Nests are generally placed in conifers or on rock ledges.
Here in Colorado, common ravens are found throughout the mountains and western deserts and have, in my experience, become increasingly common along the Front Range urban corridor, likely taking advantage of roadkill, discarded food and other human handouts.
