White-tailed Hummingbird vs Rufous-booted Racket-tail
Eupherusa poliocerca 比較対象 Ocreatus addae
Side-by-Side Comparison
| 属性 | White-tailed Hummingbird | Rufous-booted Racket-tail |
|---|---|---|
| 学名 | Eupherusa poliocerca | Ocreatus addae |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Trochilidae | Trochilidae |
| 保全状況 | Near Threatened | Not Evaluated |
| 体長 | — | — |
| 翼開長 | 12.1 cm (4.8 in) | — |
| 体重 | 4.625 g (0.16 oz) | 3.0 g (0.11 oz) |
| 食性 | Feeds on nectar from flowering shrubs and epiphytes. Catches small insects and spiders to meet … | Nectarivore of Bolivian and Peruvian cloud forest; visits Ericaceae and bromeliads. Gleans small insects from … |
| 一腹卵数 | 2 | 2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
White-tailed Hummingbird
Harsh, buzzy chatter with emphatic rhythm; coarse rough notes delivered rapidly with raw buzzy texture.
Rufous-booted Racket-tail
Deep, resonant hum barely audible; extremely low vibration barely perceptible during hovering near high-altitude flowers.
Geographic Range & Migration
White-tailed Hummingbird
Endemic to the Sierra Madre del Sur of Guerrero and Oaxaca, Mexico. Classified as Vulnerable due to restricted range.
Rufous-booted Racket-tail
Found in cloud forests of northern Bolivia and adjacent Peru and Brazil at 400–1,400 m elevation.
保全状況
White-tailed Hummingbird
Rufous-booted Racket-tail
About These Birds
White-tailed Hummingbird
メキシコのゲレロ州とオアハカ州に生息するハチドリで、白い外尾羽が特徴。危急種に指定されている。
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.