I stopped at Garner State Park in the Texas Hill Country to have my lunch 2 days ago and was delighted to find the camping area near the Frio River to be very birdy. In addition to dozens of Yellow-rumped Warblers I found this bright Pine Warbler actively foraging in a mixed flock. Other birds included Carolina Chickadees, Carolina Wrens, Golden-fronted Woodpeckers and Eastern Bluebirds. I think this species, which is usually found a little further east, isn't very common here.
This one is quite bright yellow, very fitting for a warm day with temps in the upper 70's. SeEtta