Rufous-booted Racket-tail vs White-tailed Goldenthroat
Ocreatus addae เปรียบเทียบกับ Polytmus guainumbi
Side-by-Side Comparison
| คุณสมบัติ | Rufous-booted Racket-tail | White-tailed Goldenthroat |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Ocreatus addae | Polytmus guainumbi |
| อันดับ | Caprimulgiformes | Caprimulgiformes |
| วงศ์ตระกูล | Trochilidae | Trochilidae |
| สถานะการอนุรักษ์ | Not Evaluated | Least Concern |
| ความยาว | — | — |
| กว้างปีก | — | 11.8 cm (4.6 in) |
| น้ำหนัก | 3.0 g (0.11 oz) | 4.7 g (0.17 oz) |
| อาหาร | Nectarivore of Bolivian and Peruvian cloud forest; visits Ericaceae and bromeliads. Gleans small insects from … | Nectarivore of grassland and savanna flowers, particularly Heliconia and grasses. Catches small insects near water … |
| จำนวนไข่ | 2 | 2 |
| Population Trend | — | — |
Habitat Comparison
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ไม่มี
Rufous-booted Racket-tail only
White-tailed Goldenthroat only
Song & Call Comparison
Rufous-booted Racket-tail
Deep, resonant hum barely audible; extremely low vibration barely perceptible during hovering near high-altitude flowers.
White-tailed Goldenthroat
Sharp, crackling chatter with percussive quality; rapid dry notes delivered emphatically near territorial boundary.
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.
White-tailed Goldenthroat
Widespread in open habitats, savannas, and forest edges across Trinidad and Venezuela south through Brazil to Bolivia and Argentina. 0–900 m.
สถานะการอนุรักษ์
Rufous-booted Racket-tail
White-tailed Goldenthroat
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.
White-tailed Goldenthroat
A medium-sized hummingbird (11-12 cm) with golden-green throat and breast, found in open savannas and cerrado from Venezuela to Brazil, Bolivia, and Argentina. Long, slightly curved bill. Nectarivore of open country flowers. Named for its glittering golden throat plumage.