@Three_Ninjas They’re definitely in separate well-defined clades, American Crows are closer to Ravens (and seemingly most other crows) than Fish Crows https://t.co/0Ac5uOJTul
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Crows and Ravens go back a long way, and go everywhere, and are amazing critters. https://t.co/JejlbxZ31s https://t.co/n7MLHl38vR
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New corvid DNA study recommends splitting eastern and western (perplexus) Aus Raven, though a bit light on detail: http://t.co/UkI0xxHz
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BMC Evolutionary Biology | Abstract | Brains, tools, innovation and biogeography in crows and ravens http://t.co/cRQiMgPN