A large flycatcher with upright posture, plain brown upperparts with warm edges to flight feathers, and diagnostic and strongly contrasting bold white underparts. Juveniles are heavily streaked brown and white. Pairs and small groups inhabit arid scrub, favoring thorn trees, where they sit conspicuously on low perches, sallying or pouncing onto the ground to subdue prey. All other brown flycatchers in the same range have brown or buffy underparts.