White-rumped Swiftlet vs Black Spinetail
Aerodramus spodiopygius 对比 Telacanthura melanopygia
Side-by-Side Comparison
| 属性 | White-rumped Swiftlet | Black Spinetail |
|---|---|---|
| 学名 | Aerodramus spodiopygius | Telacanthura melanopygia |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 23.4 cm (9.2 in) | 32.4 cm (12.8 in) |
| 体重 | 7.4 g (0.26 oz) | 52.0 g (1.83 oz) |
| 食性 | Feeds on aerial plankton including tiny flies and spiders; forages in large noisy flocks above … | High-speed aerial insectivore catching small flying insects and aerial spiders during fast sustained flight. |
| 产卵数 | 1-2 | -- |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
White-rumped Swiftlet
Rapid thin twittering; high 'tsit-tsit' notes over Pacific islands; echolocation clicks in caves; colonial; produces soft chattering in roost cavities; unremarkable call
Black Spinetail
Deep, resonant chattering with gravelly undertones; series of rough churring notes interspersed with sharp screaming calls.
Geographic Range & Migration
White-rumped Swiftlet
Found across the southwestern Pacific including Fiji, Samoa, Tonga, and Vanuatu east to the Cook Islands. Resident from coast to mountains.
Black Spinetail
Found in West and Central Africa from Nigeria and Cameroon east to Uganda. Resident in lowland rainforest and forest edge.
保护状况
White-rumped Swiftlet
Black Spinetail
How to Tell Them Apart
White-rumped Swiftlet
Small; dark brownish-black upperparts with faint gloss; white rump patch contrasting sharply with dark back and tail; underparts pale greyish-white; forked tail; widespread Pacific species with diagnostically bright white rump.
Black Spinetail
Large; entirely black plumage with slight gloss; black rump unlike white-rumped congeners; underparts dark; spiny tail; West African forest species; all-black coloration with no contrasting markings distinguishes it from all …
About These Birds
White-rumped Swiftlet
一种小型金丝燕（体长10-11厘米），广泛分布于从俾斯麦群岛至斐济的西太平洋地区。属雨燕科（Apodidae），是太平洋金丝燕中分布最广者之一。
Black Spinetail
A medium-sized spinetail swift (14-15 cm) of lowland rainforests in West and Central Africa. All-dark plumage. Spine-tipped tail for bracing against tree trunks. Aerial insectivore, foraging above the forest canopy. Nests inside hollow trees. Uncommon and seldom observed.