Blue-tailed Hummingbird vs Allen's Hummingbird
Saucerottia cyanura 对比 Selasphorus sasin
Side-by-Side Comparison
| 属性 | Blue-tailed Hummingbird | Allen's Hummingbird |
|---|---|---|
| 学名 | Saucerottia cyanura | Selasphorus sasin |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Trochilidae | Trochilidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | — | 8.1 cm (3.2 in) |
| 体重 | 4.35 g (0.15 oz) | 3.1500000000000004 g (0.11 oz) |
| 食性 | Visits flowering trees and epiphytes for nectar; supplements diet with small arthropods including gnats, midges, … | Feeds on nectar from coastal sage scrub and forest flowers in California. Supplements diet with … |
| 产卵数 | 2 | 2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Blue-tailed Hummingbird
Soft, pure whistle with plaintive character; gentle wavering tone given quietly in shaded understory.
Allen's Hummingbird
Deep, resonant churring trill; prolonged low buzzing sound carrying well across broad coastal mangroves.
Geographic Range & Migration
Blue-tailed Hummingbird
Found in humid forests from Mexico to Costa Rica at 300-1,500 m. Resident on both Pacific and Caribbean slopes.
Allen's Hummingbird
Breeds along the Pacific coast from Oregon to southern California. Partial migrant; some Channel Islands populations resident year-round.
保护状况
Blue-tailed Hummingbird
Allen's Hummingbird
How to Tell Them Apart
Blue-tailed Hummingbird
Kai Coucal: dark brown above with iridescent sheen; rufous wings; pale buff below; long dark tail; orange-red eye; island species
Allen's Hummingbird
Fiery-throated Hummingbird (alt): males with brilliant multicolored gorget; metallic green above; females duller; pale buff below
About These Birds
Blue-tailed Hummingbird
A medium-sized hummingbird (9-10 cm) found in humid forests from Mexico to Costa Rica at 300-1,500 m. Green plumage with a blue tail. Nectarivore of forest edges and gardens. Found on both Pacific and Caribbean slopes of Central America.
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.