Three are ravens; two are crows. They are very closely related and ... "They can make tools to help make other tools, which is next level in terms of puzzle-solving ability.

The American crow is the “default” crow across most of North America. It overlaps broadly with the common raven, and to a lesser extent with the Chihuahuan raven, fish crow, and northwestern crow.

It’s a familiar sight in winter: An inky-black raven soaring over a landscape white with snow. Though similar in appearance to the American crow, the common raven (Corvus corax) is distinguished by ...