Mountain Swiftlet vs Pallid Swift
Aerodramus hirundinaceus 对比 Apus pallidus
Side-by-Side Comparison
| 属性 | Mountain Swiftlet | Pallid Swift |
|---|---|---|
| 学名 | Aerodramus hirundinaceus | Apus pallidus |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 23.0 cm (9.1 in) | 33.4 cm (13.1 in) |
| 体重 | 9.700000000000001 g (0.34 oz) | 42.25 g (1.49 oz) |
| 食性 | Entirely airborne insectivore; feeds on minute flying insects and web-dispersing spiders over open habitats. | Aerial insectivore foraging continuously in flight, taking tiny flies, beetles, and ballooning spiders. |
| 产卵数 | 1 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Mountain Swiftlet
High, thin twittering; 'tsit-tsit' over New Guinea highlands; echolocation clicks used in cave roosts; calls weakly in flight; colonial; flock calls produce soft chittering
Pallid Swift
Melodic, rolling trill with rich timbre; sustained musical phrase with slight variations on repeated delivery at dusk.
Geographic Range & Migration
Mountain Swiftlet
Found in montane New Guinea at 1,200–3,900 m. Resident in montane rainforest, moss forest, and subalpine grassland. Common in highlands.
Pallid Swift
Breeds in the Mediterranean and North Africa east to Pakistan. Migratory; winters in sub-Saharan Africa from Senegal to Ethiopia.
保护状况
Mountain Swiftlet
Pallid Swift
How to Tell Them Apart
Mountain Swiftlet
Small; dark blackish-grey upperparts; pale grey rump band; underparts pale greyish-white; forked tail; New Guinea montane endemic; similar to White-rumped Swiftlet but greyer overall and restricted to high-altitude zones.
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
Mountain Swiftlet
一种小型金丝燕（体长10-11厘米），分布于新几内亚海拔1,500至3,800米的山地地区。体羽深色。属雨燕科（Apodidae），在山地洞穴中繁殖，是高海拔金丝燕中较为独特的一种。
Pallid Swift
淡色雨燕在地中海沿岸和北非繁殖，颜色比普通雨燕更淡。