Violet-capped Woodnymph

The violet-capped woodnymph (Thalurania glaucopis) is a species of hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae. It is found in Argentina, Brazil, Paraguay, and Uruguay. The violet-capped hummingbird is 8 to 11 cm long. Males weigh 4 to 6.1 g and females 4 to 5 g. Both sexes have a medium length straight bill that is blackish and sometimes has a dark brown tip to the mandible. The adult male has a glittering violet-blue forehead and crown, dark golden-green upperparts, and a steel blue forked tail. Its underparts are brilliant green with greenish to bluish undertail coverts. The adult female is entirely green above and dirty white to pale buff below. Its tail is only slightly forked; its inner feathers are metallic green and the outer ones steel blue with white tips. Subadult males have a turquoise-blue forehead and crown, whitish bars on the thoat feathers, and grayish brown areas on its underparts.