The Rio Negro gnatcatcher (Polioptila facilis ) is a species of bird in the family Polioptilidae. It is endemic to Brazil.
Oviparous animals are female animals that lay their eggs, with little or no other embryonic development within the mother. This is the reproductive...
Flocking birds are those that tend to gather to forage or travel collectively. Avian flocks are typically associated with migration. Flocking also ...
R
starts withThe Rio Negro gnatcatcher is 10 to 11 cm (3.9 to 4.3 in) long and weighs 6 to 7 g (0.21 to 0.25 oz). The male's head, breast, and back are bluish gray and its belly white with minimal contrast between the two colors. The innermost feathers of its tail are black and the outermost white, with those between intergrading. The female is similar but paler.
The Rio Negro gnatcatcher is found in northern Amazonas state in Brazil and the immediately adjacent parts of southern Venezuela and eastern Colombia. Much of its range is drained by the Rio Negro, a blackwater tributary of the Amazon River. It inhabits the borders and canopy of humid primary forest, mostly below 500 m (1,600 ft) elevation.
The Rio Negro gnatcatcher's diet is little known but is assumed to be arthropods like that of other Polioptila gnatcatchers. It actively forages, usually as part of mixed-species flocks.
The Rio Negro gnatcatcher's breeding phenology has not been documented.
The IUCN has not assessed the Rio Negro gnatcatcher. "The species’ ecoregion of primary occurrence... not considered to be at any serious risk".
