Rufous-booted Racket-tail vs Fork-tailed Woodnymph
Ocreatus addae so với Thalurania furcata
Side-by-Side Comparison
| Thuộc Tính | Rufous-booted Racket-tail | Fork-tailed Woodnymph |
|---|---|---|
| Tên Khoa Học | Ocreatus addae | Thalurania furcata |
| Bộ | Caprimulgiformes | Caprimulgiformes |
| Họ | Trochilidae | Trochilidae |
| Tình Trạng Bảo Tồn | Not Evaluated | Least Concern |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | — | 10,9 cm (4.3 in) |
| Khối Lượng | 3,0 g (0.11 oz) | 4,4 g (0.16 oz) |
| Chế Độ Ăn | Nectarivore of Bolivian and Peruvian cloud forest; visits Ericaceae and bromeliads. Gleans small insects from … | Widespread Amazonian nectarivore visiting diverse forest-floor flowers. Supplements with insects and spiders caught in flight. |
| Số Trứng | 2 | 2 |
| Population Trend | — | — |
Habitat Comparison
Môi Trường Sống Chung
Rufous-booted Racket-tail only
Không
Fork-tailed Woodnymph only
Không
Song & Call Comparison
Rufous-booted Racket-tail
Deep, resonant hum barely audible; extremely low vibration barely perceptible during hovering near high-altitude flowers.
Fork-tailed Woodnymph
Buzzy, insect-like trill with monotonous quality; sustained rapid vibration with minimal melodic content.
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.
Fork-tailed Woodnymph
Widely distributed in humid forests from Venezuela through Amazonia to Brazil, Bolivia, and Argentina. Resident.
Tình Trạng Bảo Tồn
Rufous-booted Racket-tail
Fork-tailed Woodnymph
How to Tell Them Apart
Rufous-booted Racket-tail
Golden-bellied Starfrontlet: tiny; males with brilliant orange-gold belly; violet gorget; females green above; spotted buff below
Fork-tailed Woodnymph
Blue Bustard: males with slate-blue neck and breast; brown-vermiculated above; white belly; females brown above; pale below
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.
Fork-tailed Woodnymph
A medium-sized hummingbird (10-11 cm) widely distributed in humid forests from Venezuela through Amazonia to Brazil, Bolivia, and Argentina. Males have violet-blue underparts and green crown. Deeply forked tail. Nectarivore of forest edges and gardens.