Tawny-faced gnatwren | |
---|---|
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Aves |
Order: | Passeriformes |
Family: | Polioptilidae |
Genus: | Microbates |
Species: | M. cinereiventris |
Binomial name | |
Microbates cinereiventris (Sclater, PL, 1855) | |
The tawny-faced gnatwren or half-collared gnatwren (Microbates cinereiventris) is a species of bird in the family Polioptilidae, the gnatcatchers. It is found in Bolivia, Colombia, Costa Rica, Ecuador, Nicaragua, Panama, and Peru. [2]
The International Ornithological Committee (IOC) and BirdLife International (BLI) recognize seven subspecies of tawny-faced gnatwren: [2] [3]
However, the South American Classification Committee of the American Ornithological Society (SACC/AOS) and the Clements taxonomy have not accepted the three subspecies that Olson described but include them within M. c. peruvianus. [4] [5] [6]
The tawny-faced gnatwren is 9 to 11 cm (3.5 to 4.3 in) long and weighs 10 to 14 g (0.35 to 0.49 oz). The nominate subspecies has a rusty face with a rufous crown and a thin black stripe behind the eye. A wide black malar stripe ("moustache") separates its face from the white throat and upper breast; the last has thin black stripes. Its back is brown and its underparts are gray. The sexes are alike. The other subspecies differ in the intensity of their cheek and underparts colors, and some do not have the black stripe behind the eye. [7]
The subspecies of tawny-faced gnatwren are distributed thus:
The tawny-faced gnatwren generally inhabits the lower strata of wet, humid, primary and secondary forest, mostly below 750 m (2,460 ft) elevation. The exception is M. c. unicus, which is "known only from a single specimen...[collected] on an undetermined date between 1930 and 1943" in a much drier biome. [7]
The tawny-faced gnatwren's diet is primarily ants and other insects but also includes spiders. It forages through foliage and leaf litter while hopping through undergrowth near the ground. It regularly joins mixed-species foraging flocks but rarely follows army ant swarms. [7]
Information on the tawny-faced gnatwren's breeding phenology is sparse. Nesting has been recorded in April in Costa Rica and between December and May in Colombia. The one fully-described nest was constructed of green moss with a soft inner lining. It was attached to the trunk and a limb of a broadleaf shrub and contained two eggs. [7]
The tawny-faced gnatwren's song is "a series of soft, clear, plaintive notes, 'teeeeea' or 'teeeéuw'" . Its most common call is "a nasal, complaining 'nyeeeh' or 'nyaaah'" . It also makes a chatter . [7]
The IUCN has assessed the tawny-faced gnatwren as being of Least Concern. [1] However, "Three races...are primarily restricted to ecoregions considered...to be seriously threatened as a result of habitat loss". [7]
The pale-breasted spinetail is a passerine bird in the Furnariinae subfamily of the ovenbird family Furnariidae. It is found in Costa Rica, Panama, Trinidad, and in every mainland South American country except Chile and Ecuador.
The grey-rumped swift or gray-rumped swift is a species of bird in subfamily Apodinae of the swift family Apodidae. It is found in Honduras, Nicaragua, Costa Rica, and Panama; in every mainland South American country except Chile, French Guiana, Suriname, and Uruguay; in Trinidad and Tobago; and on Grenada.
The golden-olive woodpecker is a species of bird in the subfamily Picinae of the woodpecker family Picidae. It is found from Mexico south and east through Panama, in every mainland South American country except Chile, Paraguay, and Uruguay, and Trinidad and Tobago.
The streaked xenops is a passerine bird in the Furnariinae subfamily of the ovenbird family Furnariidae. It is found in the New World from Costa Rica and Trinidad south to Bolivia and Argentina.
The blue-throated toucanet is a near-passerine bird in the toucan family Ramphastidae. It is found in Costa Rica, Panama and far northwestern Colombia.
The plain xenops is a passerine bird in the Furnariinae subfamily of the ovenbird family Furnariidae. It is found in the tropical New World from southern Mexico south as far as northern Bolivia and east across Brazil.
The bronze-tailed plumeleteer is a species of hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae. It is found in Colombia, Costa Rica, Ecuador, Nicaragua, and Panama.
The white-whiskered puffbird, also called the white-whiskered soft-wing or brown puffbird, is a near-passerine bird in the family Bucconidae, the puffbirds, nunlets, and nunbirds. It is found from southeastern Mexico through Central America, Colombia, and Ecuador into Peru.
The greenish puffleg is a species of hummingbird in the "brilliants", tribe Heliantheini in subfamily Lesbiinae. It is found in Colombia, Ecuador, Panama, and Peru.
The pied puffbird is a species of bird in the family Bucconidae, the puffbirds, nunlets, and nunbirds. It is found in Bolivia, Brazil, Colombia, Costa Rica, Ecuador, French Guiana, Guyana, Nicaragua, Panama, Peru, Suriname, and Venezuela.
The Central American pygmy owl is a species of owl in the family Strigidae. It is found in Belize, Colombia, Costa Rica, Ecuador, Guatemala, Honduras, Mexico, Nicaragua, and Panama.
The chestnut-headed crake is a species of bird in subfamily Rallinae of family Rallidae, the rails, gallinules, and coots. It is found in Bolivia, Brazil, Colombia, Ecuador, and Peru.
The song wren is a species of bird in the family Troglodytidae. It is found in Colombia, Costa Rica, Ecuador, Honduras, Nicaragua, and Panama.
The eastern woodhaunter, also known as the Amazonian woodhaunter, is a species of bird in the Furnariinae subfamily of the ovenbird family Furnariidae. It is found in Bolivia, Brazil, Colombia, Ecuador, Peru, and Venezuela.
The collared gnatwren is a species of bird in the family Polioptilidae, the gnatcatchers. It is found in Brazil, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname, and Venezuela.
The chestnut-winged foliage-gleaner is a species of bird in the Furnariinae subfamily of the ovenbird family Furnariidae. It is found in Bolivia, Brazil, Colombia, Ecuador, Peru, and Venezuela.
The tawny-throated leaftosser is a tropical American bird species in subfamily Sclerurinae, the leaftossers and miners, of the ovenbird family Furnariidae. It is also known as the Middle American leaftosser and less frequently as tawny-throated leafscraper, Mexican leaftosser or Mexican leafscraper. It is found from Mexico to Panama.
The strong-billed woodcreeper is a species of bird in the subfamily Dendrocolaptinae of the ovenbird family Furnariidae. It is found in Belize, Bolivia, Brazil, Colombia, Costa Rica, Ecuador, El Salvador, Guatemala, Guyana, Honduras, Mexico, Nicaragua, Panama, Peru, and Venezuela.
The gartered trogon, also known as the northern violaceous trogon, is a bird in the family Trogonidae, the quetzals and trogons. It is found in Mexico, all of Central America, and Colombia, Ecuador, Peru, and Venezuela.
The dusky leaftosser or South American leaftosser is a bird in subfamily Sclerurinae, the leaftossers and miners, of the ovenbird family Furnariidae. It is found in Bolivia, Brazil, Colombia, Ecuador, French Giana, Guyana, Panama, Peru, Suriname, and Venezuela.