The March issue of Birding features the work of Kevin Omland, an associate professor of biology.
![Kevin Omland](/wp-content/uploads/2012/04/kevinomland.jpg?w=291)
The author, Paul Hess writes that, Omland and his colleagues, “take an opposite view from several papers that recommend splitting the Common Raven into two species.”
The new study demonstrates a need for multiple criteria — not only genetic, but also morphological, behavioral and ecological to judge whether a population deserves full-species status.