Allen's Hummingbird vs Red-billed Streamertail

Selasphorus sasin 比較対象 Trochilus polytmus

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Side-by-Side Comparison

属性 Allen's Hummingbird Red-billed Streamertail
学名 Selasphorus sasin Trochilus polytmus
Caprimulgiformes Caprimulgiformes
Trochilidae Trochilidae
保全状況 Least Concern Least Concern
体長
翼開長 8.1 cm (3.2 in) 11.8 cm (4.6 in)
体重 3.1500000000000004 g (0.11 oz) 4.9 g (0.17 oz)
食性 Feeds on nectar from coastal sage scrub and forest flowers in California. Supplements diet with … Visits flowering trees and epiphytes for nectar; supplements diet with small arthropods including gnats, midges, …
一腹卵数 2 2
Population Trend
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Habitat Comparison

共通生息地

Allen's Hummingbird only

None

Red-billed Streamertail only

None

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Song & Call Comparison

Allen's Hummingbird

さえずり

Deep, resonant churring trill; prolonged low buzzing sound carrying well across broad coastal mangroves.

Red-billed Streamertail

さえずり

Sharp, emphatic two-note call; high accented first note followed by lower brief second, clearly projected.

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Geographic Range & Migration

Allen's Hummingbird

Breeds along the Pacific coast from Oregon to southern California. Partial migrant; some Channel Islands populations resident year-round.

Red-billed Streamertail

Endemic to Jamaica. National bird. Resident across the island in forests, gardens, and plantations at all elevations.

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保全状況

Least Concern

Allen's Hummingbird

Least Concern

Red-billed Streamertail

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How to Tell Them Apart

Allen's Hummingbird

羽毛

Fiery-throated Hummingbird (alt): males with brilliant multicolored gorget; metallic green above; females duller; pale buff below

Red-billed Streamertail

羽毛

Goliath Coucal: large; dark glossy black-brown above; rufous wings; dark streaked below; red eye; massive size; long graduated tail

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About These Birds

Allen's Hummingbird

A small hummingbird (8-9 cm) breeding along the Pacific coast from Oregon to southern California. Males have an orange-red throat and rufous flanks. Closely related to Rufous Hummingbird. Partial migrant; some populations resident on Channel Islands. Named after Thomas Allen.

Red-billed Streamertail

ロングテイルドジャマイカンハミングバードはジャマイカ固有のハチドリです。雄は極めて長い尾羽と緑の羽毛が特徴的です。

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