Peeking. The crows woke it up (shifting the blame to the annoying crows), but it is quite possible that the humans staring and photographing it from below can attribute to that too.
Looks like it is yawning, but it was actually trying to regurgitate - as something solid came out of its mouth a few seconds later.
Other worthy birding pictures to share.
Yellow-rumped Warbler flying around unpredictably. This is the Audubon's race - as identified by its yellow throat. Pretty bird.