Today's Bird is the Yellow Warbler. You can tell a Yellow Warbler apart from other small yellow birds by the streaking on its chest. There's a few other indicators to help tell females apart, but the streaks are the easiest and most obvious on the boys. The Yellow Warbler is a North American bird that's fairly common. They migrate through South Texas and a few will stay the winter, but most will head on down to Central America.
I took this picture at the Warbler Rest Stop on South Padre Island on April 29, 2012.