White-tailed Goldenthroat vs Allen's Hummingbird
Polytmus guainumbi 比較対象 Selasphorus sasin
Side-by-Side Comparison
| 属性 | White-tailed Goldenthroat | Allen's Hummingbird |
|---|---|---|
| 学名 | Polytmus guainumbi | Selasphorus sasin |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Trochilidae | Trochilidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 11.8 cm (4.6 in) | 8.1 cm (3.2 in) |
| 体重 | 4.7 g (0.17 oz) | 3.1500000000000004 g (0.11 oz) |
| 食性 | Nectarivore of grassland and savanna flowers, particularly Heliconia and grasses. Catches small insects near water … | Feeds on nectar from coastal sage scrub and forest flowers in California. Supplements diet with … |
| 一腹卵数 | 2 | 2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
White-tailed Goldenthroat
Sharp, crackling chatter with percussive quality; rapid dry notes delivered emphatically near territorial boundary.
Allen's Hummingbird
Deep, resonant churring trill; prolonged low buzzing sound carrying well across broad coastal mangroves.
Geographic Range & Migration
White-tailed Goldenthroat
Widespread in open habitats, savannas, and forest edges across Trinidad and Venezuela south through Brazil to Bolivia and Argentina. 0–900 m.
Allen's Hummingbird
Breeds along the Pacific coast from Oregon to southern California. Partial migrant; some Channel Islands populations resident year-round.
保全状況
White-tailed Goldenthroat
Allen's Hummingbird
How to Tell Them Apart
White-tailed Goldenthroat
Blue-headed Sapphire: metallic blue head and throat; bronzy-green body; white underparts with buff flanks; females paler with spotted throat
Allen's Hummingbird
Fiery-throated Hummingbird (alt): males with brilliant multicolored gorget; metallic green above; females duller; pale buff below
About These Birds
White-tailed Goldenthroat
A medium-sized hummingbird (11-12 cm) with golden-green throat and breast, found in open savannas and cerrado from Venezuela to Brazil, Bolivia, and Argentina. Long, slightly curved bill. Nectarivore of open country flowers. Named for its glittering golden throat plumage.
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.