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The crow genus makes up a third of the species in the Corvidae family. The members appear to have evolved in Asia from the corvid stock, which had evolved in Australia. The collective name for a group of crows is a flock or a murder.
Recent research has found some crow species capable of not only tool use but also tool construction. Crows are now considered to be among the world’s most intelligent animals with an encephalization quotient approaching that of some apes. (Wikipedia). Click Images below.