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Side-by-Side Comparison

属性	Sword-billed Hummingbird	White-tailed Hummingbird
学名	Ensifera ensifera	Eupherusa poliocerca
目	Caprimulgiformes	Caprimulgiformes
科	Trochilidae	Trochilidae
保护状况	Least Concern	Near Threatened
体长	—	—
翼展	15.3 cm (6.0 in)	12.1 cm (4.8 in)
体重	12.75 g (0.45 oz)	4.625 g (0.16 oz)
食性	Nectarivore uniquely adapted to extremely long flowers of Passiflora and Datura. Supplements with small insects …	Feeds on nectar from flowering shrubs and epiphytes. Catches small insects and spiders to meet …
产卵数	--	2
Population Trend	—	—

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Habitat Comparison

共同栖息地

🌲 Forest

Sword-billed Hummingbird only

🌾 Grassland

White-tailed Hummingbird only

无

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Song & Call Comparison

Sword-billed Hummingbird

鸣唱

Thin, reedy whistle with plaintive character; soft nasal tone held briefly then gently fading in mist.

White-tailed Hummingbird

鸣唱

Harsh, buzzy chatter with emphatic rhythm; coarse rough notes delivered rapidly with raw buzzy texture.

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Geographic Range & Migration

Sword-billed Hummingbird

Found in Andean cloud forests from Venezuela south through Colombia, Ecuador, Peru, and Bolivia. 1,700–3,500 m.

White-tailed Hummingbird

Endemic to the Sierra Madre del Sur of Guerrero and Oaxaca, Mexico. Classified as Vulnerable due to restricted range.

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保护状况

Least Concern

Sword-billed Hummingbird

Near Threatened

White-tailed Hummingbird

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How to Tell Them Apart

Sword-billed Hummingbird

羽毛

Olivaceous Thornbill: males with iridescent purple gorget; metallic olive-bronze above; white underparts; females green above; spots

White-tailed Hummingbird

羽毛

Groove-billed Ani: glossy black overall; distinctive grooved bill with ridges; long graduated tail; purple-blue gloss; communal nester

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About These Birds

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。

White-tailed Hummingbird

白尾叶绿蜂鸟，体长10-11厘米。墨西哥南部马德雷山脉特有种。易危。

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