Olivaceous Thornbill vs Rufous-booted Racket-tail
Chalcostigma olivaceum 比較対象 Ocreatus addae
Side-by-Side Comparison
| 属性 | Olivaceous Thornbill | Rufous-booted Racket-tail |
|---|---|---|
| 学名 | Chalcostigma olivaceum | Ocreatus addae |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Trochilidae | Trochilidae |
| 保全状況 | Least Concern | Not Evaluated |
| 体長 | — | — |
| 翼開長 | 16.3 cm (6.4 in) | — |
| 体重 | 7.3999999999999995 g (0.26 oz) | 3.0 g (0.11 oz) |
| 食性 | Nectarivore of high Bolivian and Peruvian páramo; short bill accesses small open flowers. Gleans insects … | 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
Olivaceous Thornbill
Buzzy, high-frequency trill with insect-like quality; sustained continuous vibration with rapid amplitude modulation.
Rufous-booted Racket-tail
Deep, resonant hum barely audible; extremely low vibration barely perceptible during hovering near high-altitude flowers.
Geographic Range & Migration
Olivaceous Thornbill
Widespread in high Andean puna grassland from Peru to Bolivia and northwestern Argentina. 3,200–4,800 m.
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
Olivaceous Thornbill
Rufous-booted Racket-tail
About These Birds
Olivaceous Thornbill
ペルーからボリビアのアンデスのプナとパラモ（3,500〜4,800 m）の小型ハチドリ（11〜12 cm）。オリーブ緑色の羽衣にほんのわずかな喉の虹色。高高度の開花植物で花蜜を吸う。
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.