This morning I read a message on Texbirds from Jim Hinson (a great local birder), saying that he had seen a Pyrrhuloxia at exactly the same place where I saw my bird.
Naturally I did a detour to Longenbaugh Road on my way to work. And the Pyrrhuloxia was very obliging this time - not only did she appear, but she kept coming out into the open over and over again.
The site also had several sparrow species, including Field Sparrow (US life bird #396 for me), White-crowned, Vesper, Song and Lincoln's.
Immature White-crowned Sparrow
The busiest and perhaps the prettiest bird was this Blue-gray Gnatcatcher.
Other birds included American Robin, Roby-crowned Kinglet and Orange-crowned Warbler.