Rufous-booted Racket-tail vs Black-billed Streamertail
Ocreatus addae 비교 대상 Trochilus scitulus
Side-by-Side Comparison
| 속성 | Rufous-booted Racket-tail | Black-billed Streamertail |
|---|---|---|
| 학명 | Ocreatus addae | Trochilus scitulus |
| 목 | Caprimulgiformes | Caprimulgiformes |
| 과 | Trochilidae | Trochilidae |
| 보전 상태 | Not Evaluated | Least Concern |
| 체장 | — | — |
| 날개 폭 | — | 13.0 cm (5.1 in) |
| 체중 | 3.0 g (0.11 oz) | 4.7 g (0.17 oz) |
| 식성 | Nectarivore of Bolivian and Peruvian cloud forest; visits Ericaceae and bromeliads. Gleans small insects from … | Nectarivore probing tubular flowers in humid forest. Supplements nectar diet with small insects and spiders … |
| 산란 수 | 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.
Black-billed Streamertail
Buzzy, insect-like sustained trill; continuous high-frequency vibration with rapid modulation near nectar flowers.
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.
Black-billed Streamertail
Endemic to the eastern Blue Mountains of Jamaica. Restricted to montane forest. Sometimes treated as subspecies.
보전 상태
Rufous-booted Racket-tail
Black-billed Streamertail
How to Tell Them Apart
Rufous-booted Racket-tail
Golden-bellied Starfrontlet: tiny; males with brilliant orange-gold belly; violet gorget; females green above; spotted buff below
Black-billed Streamertail
Black-faced Coucal: glossy black head; rufous-brown wings; black underparts; red eye; long dark tail; sexually similar plumage
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.
Black-billed Streamertail
자메이카 동부 블루 마운틴에 고유한 벌새로 몸 9~10cm에 수컷은 긴 꼬리 장식 깃털을 가집니다. 수컷은 초록색 몸통과 긴 검은 꼬리 장식 깃털이 특징이며, 제한된 분포 범위를 가집니다.