black throated green warbler
olive green upperparts yellowish underparts black throat and mask white eyebrow white wing bars black tail with white spots long bill yellow flanks and undertail coverts short, rounded wings
black throated green warbler which has olive green upperparts black throated green warbler which has yellowish underparts black throated green warbler which has black throat and mask black throated green warbler which has white eyebrow black throated green warbler which has white wing bars black throated green warbler which has black tail with white spots black throated green warbler which has long bill black throated green warbler which has yellow flanks and undertail coverts black throated green warbler which has short, rounded wings