![]() ![]() Ravens have a wedge-shaped tail, distinguishing them from crows, which have a fan-shaped tail. One's "flight call" was another's "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. These activities were then lumped into categories, nestling's kaah for hunger, antagonist kaaa for defense, quork for territorial advertisement. The researchers correlated raven behavior with the calls, as well. One bird's quork was another bird's kra, and was another's caw. These sounds, though, vary greatly from area to area. One observation that was consistent throughout the findings is that ravens have a wide repertoire of vocalizations. The common raven's scientific name, Corvus corax, means "raven croaker." Noted for their calls, Bernd Heinrich writes in "Ravens in Winter" how many researchers have studied ravens and their vocalizations. In flight, the tail appears wedge-shaped, which distinguishes it from crows. ![]() Their coloration is all black with a metallic shine of purple or violet that is noticeable in certain lighting conditions. The largest member of the crow family, ravens average 24 inches tall, with a wingspan of 46-56 inches. ![]()
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