A few swallows in flight*, as well as a Caspian tern, an ash-throated flycatcher, and a great blue heron. A singing bird displaying a nictitating membrane, half closed. The May birding transect out of Escobar Gate. Other images from today are in the adjacent gallery, and in "Adventures on a Smaller Scale".
*For a more complete collection of swallows in flight, and an explanation of the letters A, B, C, ..., see the adjacent collection, "Swallows in Flight". PLEASE HELP with IDs if you know them! Leave a comment!