This trio of American Crows was observed high in a tree overlooking the shores of Lake Lewisville. They quickly moved along as we drew nearer.

Wikipedia has this to say about American Crows:

It is one of several species of corvid that are entirely black, though it can be distinguished from the other two such birds in its range—from the Common Raven (C. corax) by size and behavior and from the Fish Crow (C. ossifragus) by call (but see below). It is also distinguished from the Raven by its smaller, more curved bill than the parallel bill of the raven, and its squared tail.