Chestnut-capped Blackbird ( Chrysomus (Agelaius) ruficapillus )

Physical appearance:
17,5 cm. The male is bluish black with the forehead and chest chestnut. The female is olive brown streaked in brown in the upper parts. The immature is brown and striated.
Distribution:
Eastern South America from French Guyana to northern Argentina and as far west as Mato Grosso and eastern Bolivia.
Habitat:
Lives in humid grasslands, wetlands and ponds.
Diet:
Feeds mainly on insects and seeds, but also on fruits.
Reproduction:
Often nests in groups. The nest is built in a fork of a tree. Both male and female build the nest watering the material before using it. The nest is a deep basket.
Natural history:
The vocalization is melodic and commonly the predominant song in wetlands. It often sings in group, making a lot of noise. Sometimes it stretches the neck to touch its own throat with the beak. The populations from colder areas migrate in the winter. May cause losses to rice crops.