Long-tailed Sylph vs Rufous-booted Racket-tail
Aglaiocercus kingii so với Ocreatus addae
Side-by-Side Comparison
| Thuộc Tính | Long-tailed Sylph | Rufous-booted Racket-tail |
|---|---|---|
| Tên Khoa Học | Aglaiocercus kingii | Ocreatus addae |
| Bộ | Caprimulgiformes | Caprimulgiformes |
| Họ | Trochilidae | Trochilidae |
| Tình Trạng Bảo Tồn | Least Concern | Not Evaluated |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | 11,7 cm (4.6 in) | — |
| Khối Lượng | 5,25 g (0.19 oz) | 3,0 g (0.11 oz) |
| Chế Độ Ăn | Nectarivore of Andean cloud forest; forages at Ericaceae and epiphyte blooms. Supplements diet with small … | 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
Long-tailed Sylph only
Rufous-booted Racket-tail only
Không
Song & Call Comparison
Long-tailed Sylph
Melodic, flowing phrase with rich character; warm notes weaving in relaxed sequence typical of dawn chorus activity.
Rufous-booted Racket-tail
Deep, resonant hum barely audible; extremely low vibration barely perceptible during hovering near high-altitude flowers.
Geographic Range & Migration
Long-tailed Sylph
Widespread in Andean cloud forests from Venezuela south through Colombia, Ecuador, Peru, and Bolivia. 1,000–2,800 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
Long-tailed Sylph
Rufous-booted Racket-tail
How to Tell Them Apart
Long-tailed Sylph
Rufous Hummingbird: males with brilliant orange-rufous body; iridescent red gorget; females green above; rufous-washed below
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
Long-tailed Sylph
A spectacular hummingbird (10 cm body + 13 cm tail in males) found in Andean cloud forests from Venezuela to Bolivia at 1,500-3,000 m. Males have extraordinarily long, iridescent violet-blue outer tail feathers. Nectarivore of montane forest edges. A cloud forest icon.
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.