For ravens, it makes sense to follow wolves around and scavenge the remains of their kills. An intelligent and remarkably adaptable bird, living as a scavenger and predator, it can survive at all seasons in surroundings as different as hot desert and high Arctic tundra. Scientists believe that this is exactly why wolves hunt in packs.
Ravens have a much louder and more deep-throated cry, and they probably use it in much the same way crows do. The specific epithet corax is the Latinized form of the Greek word κόραξ meaning "raven" or "crow". Scientists have placed their vocalizations into as many as 33 different categories based on sound and context. Often its deep croaking call will alert the observer to a pair of ravens soaring high overhead. Taxonomy. One raven can scavenge 1.8 kilograms (4 lb) in a day from a 450-kilogram (1,000 lb) moose. Now imagine what several ravens could do. Of the birds classified as perching birds or "songbirds," the Common Raven is the largest, the size of a hawk. It is the type species of the genus Corvus, derived from the Latin word for "raven". They're calling out to their family, possibly letting them know where food is. Common Ravens make many different kinds of calls varying from a low, gurgling croak to harsh grating sounds and shrill alarm calls. The common raven was one of the many species originally described by Linnaeus in his 18th century work, Systema Naturae, and it still bears its original name of Corvus corax. [2]