Pallid Swift vs Grey-rumped Swift
Apus pallidus 比較対象 Chaetura cinereiventris
Side-by-Side Comparison
| 属性 | Pallid Swift | Grey-rumped Swift |
|---|---|---|
| 学名 | Apus pallidus | Chaetura cinereiventris |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 33.4 cm (13.1 in) | 20.9 cm (8.2 in) |
| 体重 | 42.25 g (1.49 oz) | 16.15 g (0.57 oz) |
| 食性 | Aerial insectivore foraging continuously in flight, taking tiny flies, beetles, and ballooning spiders. | Obligate aerial forager catching small flies, aphids, winged termites, and airborne spiders on the wing. |
| 一腹卵数 | 1-4 | 2-4 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Pallid Swift
Melodic, rolling trill with rich timbre; sustained musical phrase with slight variations on repeated delivery at dusk.
Grey-rumped Swift
Soft, rippling trill with gentle buzzy overtones; light aerial call carrying a faint liquid quality on calm mornings.
Geographic Range & Migration
Pallid Swift
Breeds in the Mediterranean and North Africa east to Pakistan. Migratory; winters in sub-Saharan Africa from Senegal to Ethiopia.
Grey-rumped Swift
Found from Nicaragua south through Central America and northwestern South America to Bolivia and Brazil. Resident in lowland forest and edge.
保全状況
Pallid Swift
Grey-rumped Swift
How to Tell Them Apart
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 …
Grey-rumped Swift
Small; dark blackish-brown upperparts; pale grey rump contrasting with dark back; underparts dark grey-brown; short spiny tail; Neotropical species with the grey rump as key field mark; widespread from Caribbean …
About These Birds
Pallid Swift
カフリアマツバメは地中海沿岸やアフリカ北部に繁殖し、ヨーロッパアマツバメより淡い色合いが特徴的である。
Grey-rumped Swift
中米から南ブラジルの湿潤林に生息する中型アマツバメ（11〜12 cm）。対照的な淡い灰色の腰帯を持つ暗灰色の羽衣。短い棘状の尾。空中で昆虫を捕食。