Crow bird is a member of the Corvidae family. Its genus Corvus is widely spread across the world with more than forty identified species. Researchers link the evolution of these birds to the corvid stock in Asia which originated in Australia.

All the species have the same appearance without much difference between the genders. They are entirely black in color while some possess slightly grey or white colored plumage. Their beaks and legs are strong while the overall body is stout.

The species spread from Asia to several other places including Europe, Australia, North America and Australia. In fact, they are widely distributed over all temperate regions. However, the places where they are not found include South America, Antarctica, New Zealand and different islands.