The researcher's correlated raven behavior with the calls, as well. These activities were then lumped into categories, nestling's kaah for hunger, antagonist kaaa for defense, quork for territorial advertisement. But what the researchers also found while reviewing the sonograms of each other's work, was that they, the researchers, often found little common ground. The raven is often confused with its close relative, the crow, but there are major differences between the two species that are apparent when crows and ravens are seen together. Ravens are more solitary than crows, which will often assemble in large flocks.
Ravens eat rodents, insects, grain, fruit, bird eggs and refuse.
They consume much carrion, especially in winter and will even prey upon sick and injured animals. A raven is every bit as alert as a crow and possesses sharp eyesight and hearing. Behavior Ravens are strong fliers that can hover in place like American kestrels or soar like a hawk. They may fly like stunt pilots at times, doing partial barrel-rolls in flight. The birds may form large flocks of over several hundred individuals during their autumnal migration.