Golden-crowned Emerald vs Rufous-booted Racket-tail
Cynanthus auriceps 对比 Ocreatus addae
Side-by-Side Comparison
| 属性 | Golden-crowned Emerald | Rufous-booted Racket-tail |
|---|---|---|
| 学名 | Cynanthus auriceps | Ocreatus addae |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Trochilidae | Trochilidae |
| 保护状况 | Least Concern | Not Evaluated |
| 体长 | — | — |
| 翼展 | — | — |
| 体重 | 2.2 g (0.08 oz) | 3.0 g (0.11 oz) |
| 食性 | Hovering nectarivore of lowland and montane forest, probing Heliconia and garden flowers. Supplements with insects … | Nectarivore of Bolivian and Peruvian cloud forest; visits Ericaceae and bromeliads. Gleans small insects from … |
| 产卵数 | 2 | 2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Golden-crowned Emerald
Deep, resonant trill with buzzing quality; powerful churring vibration carrying impressively across open slopes.
Rufous-booted Racket-tail
Deep, resonant hum barely audible; extremely low vibration barely perceptible during hovering near high-altitude flowers.
Geographic Range & Migration
Golden-crowned Emerald
Endemic to the Pacific slope of western Mexico from Sinaloa to Guerrero. Resident in tropical deciduous forest.
Rufous-booted Racket-tail
Found in cloud forests of northern Bolivia and adjacent Peru and Brazil at 400–1,400 m elevation.
保护状况
Golden-crowned Emerald
Rufous-booted Racket-tail
About These Birds
Golden-crowned Emerald
A medium-sized hummingbird (9-10 cm) endemic to the Pacific slope of western Mexico from Sinaloa to Guerrero. Males have a golden crown and green body. Nectarivore of tropical deciduous and semi-arid forest. A Mexican endemic.
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.