The first photo was taken in Jan. 2010 at St. Marks NWR in Florida. It is this plumage that I usually see in the southeastern states.
The second photo was taken in May 2017 in Michigan. This was the first time I had seen the Blue-gray in breeding plummage. I was surprised by the dramatic difference produced by the black band on the sides of the crown with the dark stripe extending from the bill to back behind the eye.
While researching the changes in plumage of the Blue-gray Gnatcher on the web I discovered the web-based Life Histories of Familiar North American Birds by Arthur Cleveland Bent and plan to make much use of this valuable resource.
An excerpt from Bent's description of the behavior of the Blue-gray Gnatcatcher - "The gnatcatcher is a little bird of intense activity; active, not with the methodical continuity of the brown creeper, but with an irrepressible vivacity of its own in all phases of its life cycle--feeding, nesting, care of its young--at all times, in fact, except during the enforced inertia of incubation."
Glimpses of Our Natural World
I am an amateur photographer with a specific interest in nature photography, especially bird photography. I live in Pensacola FL and specialize in photos taken in Central Florida, the panhandle of Florida, the Gulf Coast of Louisiana and Texas.