Crow is a widely distributed genus of birds in the family Corvidae. Ranging in size from the relatively small pigeon-size jackdaws (Eurasian and Daurian) to the typical raven of the Holarctic area and thick-billed raven of the highlands of Ethiopia, the 40 or so members of this genus occur on all temperate continents except South America, [ ]
http://worldgeographicchannel.com/the-murder-of-crows-nature-documentary-documentary-films/
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