White-sided Hillstar vs Allen's Hummingbird
Oreotrochilus leucopleurus 对比 Selasphorus sasin
Side-by-Side Comparison
| 属性 | White-sided Hillstar | Allen's Hummingbird |
|---|---|---|
| 学名 | Oreotrochilus leucopleurus | Selasphorus sasin |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Trochilidae | Trochilidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 13.6 cm (5.4 in) | 8.1 cm (3.2 in) |
| 体重 | 6.6 g (0.23 oz) | 3.1500000000000004 g (0.11 oz) |
| 食性 | Nectarivore foraging above treeline at sparse Ericaceae and Chuquiraga patches. Supplements with small arthropods. | 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
White-sided Hillstar
Melodic, ascending phrase with hopeful character; smooth pure tones rising steadily in clear musical progression at dawn.
Allen's Hummingbird
Deep, resonant churring trill; prolonged low buzzing sound carrying well across broad coastal mangroves.
Geographic Range & Migration
White-sided Hillstar
Found in the Andes and Patagonian steppe of Argentina and Chile from 1,000–4,000 m. Partly migratory.
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
White-sided Hillstar
Allen's Hummingbird
About These Birds
White-sided Hillstar
A medium-sized hummingbird (12-13 cm) found in the southern Andes from Bolivia to Argentina at 2,500-4,500 m. Green plumage with white flanks. Nectarivore of puna grasslands and rocky slopes. Enters torpor nightly to survive cold Andean nights. Southern Andean near-endemic.
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.