Pallid Swift vs Costa Rican Swift
Apus pallidus 比較対象 Chaetura fumosa
Side-by-Side Comparison
| 属性 | Pallid Swift | Costa Rican Swift |
|---|---|---|
| 学名 | Apus pallidus | Chaetura fumosa |
| 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) | 21.2 cm (8.3 in) |
| 体重 | 42.25 g (1.49 oz) | 18.2 g (0.64 oz) |
| 食性 | Aerial insectivore foraging continuously in flight, taking tiny flies, beetles, and ballooning spiders. | Entirely airborne feeder on tiny flies, gnats, and airborne arachnids; one of the most aerial … |
| 一腹卵数 | 1-4 | -- |
| 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.
Costa Rican Swift
Thin, insect-like buzz alternating with soft clicks; delicate high trill delivered during swift wheeling flight over valleys.
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.
Costa Rican Swift
Found along the Pacific slope of Costa Rica and Panama. Resident in lowland and foothill forest and forest edge below 1,000 m.
保全状況
Pallid Swift
Costa Rican 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 …
Costa Rican Swift
Small; uniformly dark sooty-brown with rump barely paler than dark back; underparts dark grey-brown; short spiny tail; Central American Pacific slope species; exceptionally dark and uniform compared to most Chaetura …
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。
Costa Rican Swift
コスタリカ太平洋斜面とパナマ西部固有の小型アマツバメ（11 cm）。淡い灰色の腰帯を持つ暗い羽衣。棘状の尾。湿潤林の林冠上を飛翔する空中昆虫食性。詳細不明。