Dwarf Vireo

The dwarf vireo is 10 to 11 cm (3.9 to 4.3 in) long; two individuals weighed 9.2 and 9.4 g (0.32 and 0.33 oz). The sexes have similar plumage. Adult males have a bluish gray crown and adult females an olive crown. Both sexes have grayish white lores and a grayish white eye-ring with a gap above the eye on an otherwise grayish olive to olive face. Their upperparts are grayish olive to olive. Their wing coverts are dusky with grayish white tips that form two wing bars. Their flight feathers are dusky with pale olive gray edges. Voice: One description of the dwarf vireo's song is "rich to slightly scratchy, hurried warbling phrases, often prolonged, and short, scratchy, warbled phrases, whee chi-a-wee wee-chi, or wee ch'wee wee chir'-awee, or wi chee'r ch wit, etc.". Its calls include "a short, dry dri-dri-it or chi-chi chi-chi-chi,...a gnatcatcher Polioptila-like mewing meearr-meear, and a scolding cheh-cheh...or jeh-jeh-jehr".