Christmas Island Swiftlet vs White-collared Swift
Collocalia natalis 对比 Streptoprocne zonaris
Side-by-Side Comparison
| 属性 | Christmas Island Swiftlet | White-collared Swift |
|---|---|---|
| 学名 | Collocalia natalis | Streptoprocne zonaris |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Not Evaluated | Least Concern |
| 体长 | — | — |
| 翼展 | — | 42.5 cm (16.7 in) |
| 体重 | 4.75 g (0.17 oz) | 106.45 g (3.75 oz) |
| 食性 | Aerial plankton feeder taking tiny midges, fungus gnats, and ballooning spiders in rapid coursing flights. | Obligate aerial insectivore; gathers small flying insects, winged ants, and airborne spiders during flight. |
| 产卵数 | 2 | 2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Christmas Island Swiftlet
Very high, thin twittering; 'chip' notes over Christmas Island forest; audible echolocation clicks in sea cave roosts; one of smallest swiftlets; barely audible to humans
White-collared Swift
Loud, screaming 'shreee-shreee'; powerful screeching trill; calls from large flocks over mountains; very audible; one of the loudest Neotropical swifts; alarm a harsh rattle
Geographic Range & Migration
Christmas Island Swiftlet
Endemic to Christmas Island in the eastern Indian Ocean. Resident in forested areas. Small population vulnerable to introduced predators.
White-collared Swift
Found from Mexico south through Central America to South America east of the Andes, reaching Bolivia and southern Brazil. Often in large flocks.
保护状况
Christmas Island Swiftlet
White-collared Swift
How to Tell Them Apart
Christmas Island Swiftlet
Tiny; dark brownish-black upperparts with minimal gloss; pale grey-buff rump band; greyish-white underparts; forked tail; Christmas Island endemic; differs from Cave Swiftlet in duller upperparts and restricted oceanic island range.
White-collared Swift
Large; glossy blue-black plumage with bold broad white collar encircling entire neck; collar clean and complete; underparts black; large slightly forked tail; among the most recognisable Neotropical swifts due to …
About These Birds
Christmas Island Swiftlet
圣诞岛金丝燕(Collocalia natalis)是一种体长12厘米的小型金丝燕，为印度洋圣诞岛特有种。深色羽毛，叉形尾。空中捕食昆虫，在岛上的洞穴中筑巢，是圣诞岛少数特有鸟类之一。
White-collared Swift
白领雨燕广泛分布于拉丁美洲山地，以白色颈环为特征的大型雨燕。