Rufous-booted Racket-tail vs Green-backed Firecrown
Ocreatus addae 比較対象 Sephanoides sephaniodes
Side-by-Side Comparison
| 属性 | Rufous-booted Racket-tail | Green-backed Firecrown |
|---|---|---|
| 学名 | Ocreatus addae | Sephanoides sephaniodes |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Trochilidae | Trochilidae |
| 保全状況 | Not Evaluated | Least Concern |
| 体長 | — | — |
| 翼開長 | — | 12.0 cm (4.7 in) |
| 体重 | 3.0 g (0.11 oz) | 6.583333333333333 g (0.23 oz) |
| 食性 | Nectarivore of Bolivian and Peruvian cloud forest; visits Ericaceae and bromeliads. Gleans small insects from … | Nectarivore foraging at diverse temperate-zone flowers in Chile and Argentina, including Fuchsia and Embothrium. Takes … |
| 一腹卵数 | 2 | 1-2 |
| 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.
Green-backed Firecrown
Crisp, whistled descending phrase; clean notes stepping down smoothly with precision and musical elegance at dawn.
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.
Green-backed Firecrown
Found along the length of Chile and western Argentina in temperate forest and scrub. Sea level to 2,000 m. Migratory.
保全状況
Rufous-booted Racket-tail
Green-backed Firecrown
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.
Green-backed Firecrown
A medium-sized hummingbird (10-11 cm) found in temperate forests of southern South America from central Chile and Argentina to Tierra del Fuego. Green plumage with coppery-green crown. The southernmost hummingbird species, tolerating sub-zero temperatures. Nectarivore of native Fuchsia and Embothrium.