Chesnut-headed Oropendola
Psarocolius wagleri

f6.7 @ 1/500s, ISO:1600, Nikon D3S w 500mm and 1.7X teleconverter

"Chesnut-headed Oropendola," Wikipedia, the free encyclopedia. The chestnut-headed oropendola is a New World tropical icterid bird.The male is 35 cm (14 in) long and weighs 225 g (7.9 oz); the smaller female is 28 cm (11 in) long and weighs 125 g (4.4 oz). The wings are very long. Adult males are mainly black with a chestnut head and rump and a tail which is bright yellow apart from two dark central feathers. The iris is blue and the long bill is whitish. Females are similar, but smaller and duller than males. It is a resident breeder in the Caribbean coastal lowlands from southern Mexico to central Costa Rica, both slopes of southern Costa Rica and Panama, and the Pacific lowlands of Colombia and north-eastern Ecuador.
El Valle de Anton, Panama