Mystery bird

I was outside taking the bungie cords off the trash can around 6 a.m. this morning when I heard an unusual birdcall. When I looked up, I saw the shape above.

Rushed inside, grabbed my camera and telephoto lens, shot a close-up:

The light blue line is the telephone wire. I increased the exposure in the image to better see the details on the bird, but I don't have time right now to do much other editing.

Anyone know what kind of bird this is? I only managed to get a few shots before the bird flew off.

Got home from the cottage yesterday afternoon but I'm leaving for L.A. and the SCBWI Conference this morning. So excited!