Rufous-booted Racket-tail vs Sooty Barbthroat
Ocreatus addae 对比 Threnetes niger
Side-by-Side Comparison
| 属性 | Rufous-booted Racket-tail | Sooty Barbthroat |
|---|---|---|
| 学名 | Ocreatus addae | Threnetes niger |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Trochilidae | Trochilidae |
| 保护状况 | Not Evaluated | Least Concern |
| 体长 | — | — |
| 翼展 | — | 11.8 cm (4.6 in) |
| 体重 | 3.0 g (0.11 oz) | 5.8 g (0.20 oz) |
| 食性 | Nectarivore of Bolivian and Peruvian cloud forest; visits Ericaceae and bromeliads. Gleans small insects from … | Primarily nectarivore visiting tubular flowers; supplements diet with small insects and spiders for protein. |
| 产卵数 | 2 | 2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Rufous-booted Racket-tail
Deep, resonant hum barely audible; extremely low vibration barely perceptible during hovering near high-altitude flowers.
Sooty Barbthroat
Melodic, descending whistle with rich timbre; smooth pure tone dropping gracefully through several semitones then fading.
Geographic Range & Migration
Rufous-booted Racket-tail
Found in cloud forests of northern Bolivia and adjacent Peru and Brazil at 400–1,400 m elevation.
Sooty Barbthroat
Found in a restricted range in northeastern Brazil and adjacent French Guiana. Resident in coastal rainforest. Rare and locally distributed.
保护状况
Rufous-booted Racket-tail
Sooty Barbthroat
How to Tell Them Apart
Rufous-booted Racket-tail
Sooty Barbthroat
Dark sooty-brown and green upperparts; sooty-dark throat and breast; belly pale grey-buff; tail dark with pale tip; Guiana region endemic; distinctly darker and sootier below than other barbthroats with heavily …
About These Birds
Rufous-booted Racket-tail
A small hummingbird (8-10 cm plus tail rackets) found in Andean cloud forests of southeastern Peru and Bolivia at 1,200-2,200 m. Males have rufous leg puffs instead of white. Recently split from Booted Racket-tail. Nectarivore of montane forest undergrowth.
Sooty Barbthroat
A medium-sized hummingbird (10-12 cm) found in humid lowland forests of the eastern Amazon basin and the Guianas. Dark sooty-green plumage. Nectarivore of dense forest undergrowth. One of the least known hermit hummingbirds due to its restricted range in remote forests.