The pale-tailed barbthroat (Threnetes leucurus ) is a species of hummingbird in the family Trochilidae. It is found throughout much of the Amazon Basin from the eastern Andean foothills to the Atlantic Ocean.
In zoology, a nectarivore is an animal that derives its energy and nutrient requirements from a diet consisting mainly or exclusively of the sugar-...
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TerrestrialTerrestrial animals are animals that live predominantly or entirely on land (e.g., cats, ants, snails), as compared with aquatic animals, which liv...
Oviparous animals are female animals that lay their eggs, with little or no other embryonic development within the mother. This is the reproductive...
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Not a migrantAnimals that do not make seasonal movements and stay in their native home ranges all year round are called not migrants or residents.
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starts withThe pale-tailed barbthroat is 10 to 12.2 cm (3.9 to 4.8 in) long. Males weigh 4 to 7 g (0.14 to 0.25 oz) and females 4 to 6.5 g (0.14 to 0.23 oz). The adult male has bronze-green upperparts and breast, a dark ear patch and throat with a reddish patch below the later, and a pale malar stripe. The tail is dark with various shades and extent of color on the outer feathers. The belly is gray with ochre tints. It has a nearly straight bill. As with other hermit hummingbirds, the sexes are similar; the female's bill is somewhat more decurved than the male's and the plumage has less contrast among the throat, breast, and belly. Young birds resemble the adult but have ochraceous feather edges. The subspecies differ somewhat in the tail and belly coloration, and there are intergrades between cervinicauda and rufigastra and between rufigastra and leucurus.
The subspecies of pale-tailed barbthroat are distributed thus:
The pale-tailed barbthroat inhabits open and semi-open spaces within humid lowland and higher tropical forest, and other landscapes such as gallery forest, várzea and igapó swamp forests, and plantations. It is found from sea level to 850 m (2,790 ft) in Venezuela, in Peru mainly to 1,200 m (3,900 ft) but as high as 1,800 m (5,900 ft), and in Ecuador mainly to 1,100 m (3,600 ft) and as high as 1,600 m (5,200 ft).
![A monograph of the Trochilid?, or family of humming-birds. London: Printed by Taylor and Francis; 1861 [i.e. 1849-1861].](https://s3.animalia.bio/animals/photos/medium/original/a-monograph-of-the-trochilidc3a62c-or-family-of-humming-birds-28plate-1329-28698707583329.webp)
The pale-tailed barbthroat is presumed to be a year round resident throughout its range.
Like other hermit hummingbirds, the pale-tailed barbthroat is a "trap-line" feeder, visiting a circuit of flowering plants. It feeds on nectar at Heliconia and several other tubular flowers and also on small arthropods.
The pale-tailed barbthroat's nesting season varies widely across its range. Its nest is a cone-shaped cup of plant and other fibers and cobweb, covered with lichens, and attached to the underside tip of a long drooping leaf such as a palm frond. The female alone incubates the white eggs.
The IUCN has assessed the pale-tailed barbthroat as being of Least Concern. It has a very large range, and though its population has not been quantified it is believed to be stable. It is considered local and uncommon throughout its range and occurs in several protected areas.
