Yesterday there were flocks of white-throated sparrows, but no robins, along Onion Creek. The day before that, there were flocks of robins, but no white-throated sparrows--a fact of no obvious consequence. I've think always prefered those kinds of facts to the important ones.
But I am no closer to understanding the calls of the crows, though I can tell you they are complex and I often imagine that they have a special code for "here comes the guy with the camera; fly away while he is trying to focus." No photos of crows.
A white-throated sparrow
Cedar waxwing in the hackberries
Lincoln's sparrow beside a drying-up pond
Yellow-rumped warbler--our main wintertime warbler in Austin
A black vulture trying to gain altitude