Black-collared swallow

The black-collared swallow (Pygochelidon melanoleuca) is a species of bird in the family Hirundinidae. It is found in Argentina, Bolivia, Brazil, Colombia, French Guiana, Guyana, Paraguay, Suriname, and Venezuela. Its natural habitat is rivers—in particular, "rapids and rocky outcrops stretches of medium and large sized rivers." It forages in the rapids, and nests in rocky outcrops. It is threatened by habitat loss from hydropower dams.

This species was formerly placed in the genus Atticora. It was moved to the resurrected genus Pygochelidon based on a phylogenetic study published in 2005.

Description
As an adult, it is approximately 14 cm long, and weighes 10-12 grams.

Social Behavior
It is typically seen alone or in small groups.