White-throated Swift vs Pallid Swift
Aeronautes saxatalis 비교 대상 Apus pallidus
Side-by-Side Comparison
| 속성 | White-throated Swift | Pallid Swift |
|---|---|---|
| 학명 | Aeronautes saxatalis | Apus pallidus |
| 목 | Caprimulgiformes | Caprimulgiformes |
| 과 | Apodidae | Apodidae |
| 보전 상태 | Least Concern | Least Concern |
| 체장 | — | — |
| 날개 폭 | 28.1 cm (11.1 in) | 33.4 cm (13.1 in) |
| 체중 | 34.03 g (1.20 oz) | 42.25 g (1.49 oz) |
| 식성 | Aerial insectivore relying entirely on flying insects (midges, gnats, small beetles) and airborne spiders. | Aerial insectivore foraging continuously in flight, taking tiny flies, beetles, and ballooning spiders. |
| 산란 수 | 3-6 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
White-throated Swift
Sharp, whistled notes alternating with buzzy trills; crisp di-di-dit pattern repeated rhythmically during swift soaring flights.
Pallid Swift
Melodic, rolling trill with rich timbre; sustained musical phrase with slight variations on repeated delivery at dusk.
Geographic Range & Migration
White-throated Swift
Found in western North America from British Columbia south through the Rocky Mountains to Central America. Partially migratory northward.
Pallid Swift
Breeds in the Mediterranean and North Africa east to Pakistan. Migratory; winters in sub-Saharan Africa from Senegal to Ethiopia.
보전 상태
White-throated Swift
Pallid Swift
How to Tell Them Apart
White-throated Swift
Black upperparts; bold white throat and white flanks extending to white central underparts; black sides of breast and belly create striking tricoloured pattern; white lateral tail spots; Western North American …
Pallid Swift
Medium-large; pale brownish-grey overall, distinctly paler than Common Swift; larger pale throat patch; wing coverts show pale scaly edges; Mediterranean and Middle Eastern species; pale sandy-brown tone separates it from …
About These Birds
White-throated Swift
북미 칼새 중 독특한 흑백 깃털을 가진 중형 칼새(15~17cm). 서부 북미의 협곡 및 암석 지형에 번식하며, 겨울에는 남쪽으로 이동한다. 공중 식충성이다.
Pallid Swift
창백한 칼새는 지중해와 중동, 아시아 중부에서 번식하고 아프리카에서 월동합니다. 연한 갈색 깃털과 목의 연한 색이 특징이며, 절벽과 건물에서 번식합니다.