Black-bellied Thorntail vs Sword-billed Hummingbird
Discosura langsdorffi 对比 Ensifera ensifera
Side-by-Side Comparison
| 属性 | Black-bellied Thorntail | Sword-billed Hummingbird |
|---|---|---|
| 学名 | Discosura langsdorffi | Ensifera ensifera |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Trochilidae | Trochilidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 7.0 cm (2.8 in) | 15.3 cm (6.0 in) |
| 体重 | 3.2 g (0.11 oz) | 12.75 g (0.45 oz) |
| 食性 | Nectarivore visiting diverse canopy flowers in humid Amazonian forest. Takes small arthropods in aerial hover-gleaning. | Nectarivore uniquely adapted to extremely long flowers of Passiflora and Datura. Supplements with small insects … |
| 产卵数 | 2 | -- |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Black-bellied Thorntail
Deep, hollow churring with resonant character; prolonged low buzzing sound vibrating persistently through dense foliage.
Sword-billed Hummingbird
Thin, reedy whistle with plaintive character; soft nasal tone held briefly then gently fading in mist.
Geographic Range & Migration
Black-bellied Thorntail
Found in lowland Amazonian forest from southeastern Colombia south through Ecuador and Peru to Bolivia. 100–600 m.
Sword-billed Hummingbird
Found in Andean cloud forests from Venezuela south through Colombia, Ecuador, Peru, and Bolivia. 1,700–3,500 m.
保护状况
Black-bellied Thorntail
Sword-billed Hummingbird
How to Tell Them Apart
Black-bellied Thorntail
Red-tailed Comet: males with glittering green gorget; brilliant coppery-bronze crown; metallic green back; reddish tail; females duller
Sword-billed Hummingbird
Olivaceous Thornbill: males with iridescent purple gorget; metallic olive-bronze above; white underparts; females green above; spots
About These Birds
Black-bellied Thorntail
A tiny hummingbird (7-8 cm plus extended tail feathers) found in lowland forests from eastern Colombia through Amazonia to Bolivia and Brazil. Males have dark belly and long, wire-like outer tail feathers with racket tips. Nectarivore of forest canopy and edges.
Sword-billed Hummingbird
剑嘴蜂鸟。嘴与身体等长（8-10厘米）。栖息于安第斯云雾林。专门取食深处的西番莲花蜜。