Whereas ravens had only two species, at one time there were as many as six Homo species, only one of which survives today — Homo sapiens.

Both common ravens and American crows are members of the family Corvidae of which there are 19 members in North America. Two of the 19 are raven species, and four are crow species.

There’s no love lost between the ravens and the crows, probably because of both species’ propensity for nest robbing. The local crows have a specific flat, nasal call that appears to mean “Here comes ...

image: A raven is shown in the rain. view more Credit: Bjørn Aksel Bjerke/University of Oslo. For over a century, speciation -- where one species splits into two -- has been a central focus of ...

Holarctic ravens are the most widespread of all the raven species. The common California raven has a large, heavy bill, and glossy pointed neck feathers. About 1.5 million years ago, ...

The process started in 1999 when Omland wanted to see if common ravens were actually two species. In 2000, Omland reported the existence of California ravens in the southwest of the US, ...

Crows Are Always Jerks to Ravens, Research Confirms. A new study shows that although crows are smaller than ravens, they are almost always the aggressors when the two species interact.

The common raven is the largest of the corvids or crow family indigenous to the UK, and a species well-known in the more mountainous areas of Wales.

Ravens are protected by federal law, and the U.S. Fish and Wildlife Service recently granted Idaho a permit to kill 4,000 ravens in four areas of the state over two years.