The Northern Raven is a bit larger than the Large-billed Crow / Jungle Crow (C. macrorhynchos). It comes to Japan as a winter visitor and feeds mainly on the carcasses of large animals along the coast or in the mountains. Its call is varied ("qua-qua"; "kapo-kapo"; "calalalala", etc.), high-pitched, and carries a long distance. We can recognize its presence by these calls. Its bill is extremely large but the shape is normal, not curved like the bill of the Large-billed Crow.
Shari fishing port, 19 February 2001 |
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The Northern Raven is on the left; on the right is a Carrion Crow. (Mouth of the Shari River, 31 January 2001) |
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The length and size of the bill is clearly visible. (Cape Notoro, Abashiri, 8 January 2003) |