Rabenschwarz
Here you see a page from Josef H. Reichholf's book "Rabenschwarze Intelligenz: Was wir von Krähen lernen können" (Crow black intelligence: What we can learn from crows), March 2011
The author used the photo with my consent.
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Taken on Saturday November 19, 2011
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Posted on Saturday June 1, 2013
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Götz Kluge said: