Warbling Vireo has a grayer back, no black borders to the white supercilium, and a dark eye. Philadelphia Vireo has yellower underparts, a less distinct supercilium and a dark eye. In Florida the Black-whiskered Vireo can be distinguished from the Red-eyed by its black malar streak. In South Texas the rare Yellow-green Vireo is much yellower below and has much paler black borders to the supercilium than the Red-eyed. All other vireos have wing bars.