Black-capped Vireo

The smallest vireo that occurs regularly in the United States, the Black-capped Vireo inhabits low scrublands of Oklahoma, Texas, and northern Mexico. Habitat changes and nest parasitism by Brown-headed Cowbirds have caused Black-capped Vireo populations to vanish across much of the northern part of its historic range and it now is listed as Endangered by the U.S. Fish and Wildlife Service.