Chihuahuan Raven
This species is almost impossible to differentiate from the Common Raven (Corvus corax) and even very experienced Arizona birders told me that it is practically indistinguishable in the field. So why am I so confident that I have the correct ID? Because I saw several of them at White Sands National Monument in a short visit and on the official bird list the Chihuahuan Raven is listed as "common" and the Common Ravenis "rare".
The Chihuahuan raven is a species of bird in the family Corvidae that is native to the United States and Mexico. It was formerly known as the American white-necked raven, and has the proportions of a common raven with a heavy bill, but is about the same size as a carrion crow, or slightly larger than the American crow long). The plumage is all-black with a rich purple-blue gloss in good light. Like the forest raven, little raven, fan-tailed raven and Australian raven, it is one of the smaller raven.. more