Black-thighed Puffleg vs Rufous-booted Racket-tail
Eriocnemis derbyi so với Ocreatus addae
Side-by-Side Comparison
| Thuộc Tính | Black-thighed Puffleg | Rufous-booted Racket-tail |
|---|---|---|
| Tên Khoa Học | Eriocnemis derbyi | Ocreatus addae |
| Bộ | Caprimulgiformes | Caprimulgiformes |
| Họ | Trochilidae | Trochilidae |
| Tình Trạng Bảo Tồn | Least Concern | Not Evaluated |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 11,2 cm (4.4 in) | — |
| Khối Lượng | 5,25 g (0.19 oz) | 3,0 g (0.11 oz) |
| Chế Độ Ăn | Nectarivore of Colombian Andes; visits dense Ericaceae patches at high elevations. Catches small insects in … | Nectarivore of Bolivian and Peruvian cloud forest; visits Ericaceae and bromeliads. Gleans small insects from … |
| Số Trứng | 2 | 2 |
| Population Trend | — | — |
Habitat Comparison
Môi Trường Sống Chung
Black-thighed Puffleg only
Không
Rufous-booted Racket-tail only
Không
Song & Call Comparison
Black-thighed Puffleg
Rapid, buzzy trill with slightly harsh quality; quick series of rough notes given persistently near territorial boundaries.
Rufous-booted Racket-tail
Deep, resonant hum barely audible; extremely low vibration barely perceptible during hovering near high-altitude flowers.
Geographic Range & Migration
Black-thighed Puffleg
Found in high Andean cloud forests and páramo from Colombia south through Ecuador to northern Peru. 2,400–3,600 m.
Rufous-booted Racket-tail
Found in cloud forests of northern Bolivia and adjacent Peru and Brazil at 400–1,400 m elevation.
Tình Trạng Bảo Tồn
Black-thighed Puffleg
Rufous-booted Racket-tail
How to Tell Them Apart
Black-thighed Puffleg
Fawn-breasted Brilliant: males with brilliant violet gorget; metallic bronze-green; fawn-buff underparts; females green above; spotted
Rufous-booted Racket-tail
Golden-bellied Starfrontlet: tiny; males with brilliant orange-gold belly; violet gorget; females green above; spotted buff below
About These Birds
Black-thighed Puffleg
A small hummingbird (10-11 cm) found in Andean cloud forests from Colombia to Ecuador at 2,500-3,200 m. Green plumage with black thigh feathers and white leg puffs. Nectarivore of cloud forest and forest edges. Classified as Near Threatened due to habitat loss.
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.