The Western Kingbird is similar to several other species of kingbirds. Tropical and Couch's Kingbirds have forked tails and dark cheeks. Cassin's Kingbird has a darker breast. Western Kingbird has white outer tail feathers. Thick-billed Kingbird usually has whiter underparts and has a darker head. Brown-crested, Ash-throated and Great Crested Flycatchers are somewhat similar but have darker, browner crowns and brown and rusty tails (Western's is black and white).