Black-capped vireo

Description

The black-capped vireo is a songbird about 12 cm (4.5 inches ) in length.Sexually mature males are olive green above and white below with faint yellow flanks.The crown and upper half of the head is black with a partial white eye-ring and lores.The iris is brownish-red and the bill is black.Females are duller in color than males and have a slate gray crown and underparts washed with greenish yellow.First year males often (but do not always) have more extensive gray in the cap,similar to adult females.