"About eight inches in length, the ash-throated flycatcher is the smallest of the state's regular Myiarchus species. It has a grayish brown head and back, pale gray throat and breast, and pale yellow belly."

It is the beak and crest that suggest to me that it is a flycatcher. I can see some yellow on the belly. One problem with this identification is that this species "inhabit[s] the deserts and brushlands of the southwestern U.S., from the Pacific Coast to Texas." The East Texas flycatcher is the Great Crested Flycatcher with a bright yellow belly. This is not that bird. Tveten does add that "The species breeds commonly in western Texas eastward to Austin, Beeville and Laredo. It nests less frequently in the southern portion of the state and along the lower coast." This individual is about 150 miles further to the East than it should be.The Texas Ornithological Society Handbook of Texas Birds has a map on page 125 that places the ash-throated flycatcher to the West of a North-South line roughly from Fort Worth-Austin-Kingsville.

Here is the Cornell Lab of Ornithology Ash-Throated Flycatcher,

June 5, 2005.