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Side-by-Side Comparison

属性	Purple-backed Sunbeam	Sword-billed Hummingbird
学名	Aglaeactis aliciae	Ensifera ensifera
目	Caprimulgiformes	Caprimulgiformes
科	Trochilidae	Trochilidae
保护状况	Vulnerable	Least Concern
体长	—	—
翼展	16.2 cm (6.4 in)	15.3 cm (6.0 in)
体重	7.4 g (0.26 oz)	12.75 g (0.45 oz)
食性	Nectarivore of restricted Peruvian high puna; visits Chuquiraga and cushion-plant flowers. Gleans tiny arthropods.	Nectarivore uniquely adapted to extremely long flowers of Passiflora and Datura. Supplements with small insects …
产卵数	--	--
Population Trend	—	—

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Habitat Comparison

共同栖息地

无

Purple-backed Sunbeam only

无

Sword-billed Hummingbird only

🌲 Forest 🌾 Grassland

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Song & Call Comparison

Purple-backed Sunbeam

鸣唱

Sharp, buzzy chip followed by rapid trill; emphatic onset launching into rough cascading notes typical of sunbeam.

Sword-billed Hummingbird

鸣唱

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

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Geographic Range & Migration

Purple-backed Sunbeam

Endemic to Peru along the Río Marañón drainage in the arid upper Andes. 2,400–3,800 m. Critically endangered.

Sword-billed Hummingbird

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

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保护状况

Vulnerable

Purple-backed Sunbeam

Least Concern

Sword-billed Hummingbird

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How to Tell Them Apart

Purple-backed Sunbeam

羽毛

Blue-capped Puffleg: males with brilliant blue cap and gorget; metallic green body; white leg puffs; females green above; spotted

Sword-billed Hummingbird

羽毛

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

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About These Birds

Purple-backed Sunbeam

紫背辉蜂鸟（Aglaeactis aliciae），体长12-13厘米，特产于秘鲁北部安第斯山脉一小片区域，海拔2,900至3,700米。属蜂鸟科（Trochilidae），背部具闪光紫色斑块，分布极为局限，受到保护关注。

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。

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