Large kingbird with huge bill. Grayish-brown above with white throat and pale yellow wash on belly. Prefers riparian woodland with cottonwood trees; often perches up conspicuously. Primarily a Mexican species with very limited range in U.S. Not likely to be confused with other kingbirds given coloration and bill size. Feeds mainly on insects. Like many other flycatchers, Thick-billed Kingbird is occasionally found far outside its normal range.