Rufous-booted Racket-tail vs Green-bearded Helmetcrest
Ocreatus addae 比較対象 Oxypogon guerinii
Side-by-Side Comparison
| 属性 | Rufous-booted Racket-tail | Green-bearded Helmetcrest |
|---|---|---|
| 学名 | Ocreatus addae | Oxypogon guerinii |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Trochilidae | Trochilidae |
| 保全状況 | Not Evaluated | Least Concern |
| 体長 | — | — |
| 翼開長 | — | 14.1 cm (5.6 in) |
| 体重 | 3.0 g (0.11 oz) | 5.175000000000001 g (0.18 oz) |
| 食性 | Nectarivore of Bolivian and Peruvian cloud forest; visits Ericaceae and bromeliads. Gleans small insects from … | Nectarivore of Colombian páramo; forages at frailejón (Espeletia) and cushion plants. Catches small insects near … |
| 一腹卵数 | 2 | 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-bearded Helmetcrest
Sharp, high-pitched squeak with penetrating quality; sudden emphatic note given repeatedly near active feeding territory.
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-bearded Helmetcrest
Endemic to the eastern Andes of Colombia in high páramo at 3,200–4,800 m elevation. Locally common.
保全状況
Rufous-booted Racket-tail
Green-bearded Helmetcrest
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
Green-bearded Helmetcrest
Blue-tailed Hummingbird (alt): males with glittering blue-tipped gorget; metallic green above; blue tail; females green above with spots
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-bearded Helmetcrest
A small hummingbird (11-12 cm) endemic to the eastern Andes of Colombia at 3,500-4,500 m. Males have a green beard and erect crest. Nectarivore of páramo and treeline habitats, visiting Espeletia and Ericaceae. A Colombian endemic of high-altitude páramo.