Wikipedia on Crows:
Recent research has found some crow species capable not only of tool use, but of tool construction as well.[2] Crows are now considered to be among the world’s most intelligent animals.[3] The Jackdaw and (along with its fellow corvid, the European Magpie) has been found to have a neostriatum approximately the same relative size as is found in chimpanzees and humans, and significantly larger than is found in the gibbon.[4]
(Source: feral-alien, via dendroica)




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