Pygmy Swiftlet vs White-collared Swift
Collocalia troglodytes เปรียบเทียบกับ Streptoprocne zonaris
Side-by-Side Comparison
| คุณสมบัติ | Pygmy Swiftlet | White-collared Swift |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Collocalia troglodytes | Streptoprocne zonaris |
| อันดับ | Caprimulgiformes | Caprimulgiformes |
| วงศ์ตระกูล | Apodidae | Apodidae |
| สถานะการอนุรักษ์ | Least Concern | Least Concern |
| ความยาว | — | — |
| กว้างปีก | 18.6 cm (7.3 in) | 42.5 cm (16.7 in) |
| น้ำหนัก | 5.55 g (0.20 oz) | 106.45 g (3.75 oz) |
| อาหาร | Obligate aerial insectivore; catches minute flies, beetles, and aerial spiders while foraging near cave roosts. | Obligate aerial insectivore; gathers small flying insects, winged ants, and airborne spiders during flight. |
| จำนวนไข่ | -- | 2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Pygmy Swiftlet
Extremely high, thin twittering; among highest-pitched calls of any bird; 'tseee-tseee' barely audible to adults; uses echolocation clicks in Philippine limestone caves
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
Pygmy Swiftlet
Endemic to the Philippines, found on Mindanao and adjacent islands. Resident in lowland forest and coastal caves. One of the smallest swiftlets.
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.
สถานะการอนุรักษ์
Pygmy Swiftlet
White-collared Swift
How to Tell Them Apart
Pygmy Swiftlet
Tiny; dark blue-black upperparts with faint iridescence; white or pale buff rump band; underparts pale greyish-white; slightly forked tail; one of the smallest swiftlets in the Philippines; cave-nesting with pale …
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
Pygmy Swiftlet
The smallest swiftlet (9 cm), endemic to the Philippines. Dark grey-brown plumage. Aerial insectivore, foraging in small flocks over forest. Colonial cave nester. Despite being common, poorly studied due to the difficulty of distinguishing small, dark swiftlets in flight.
White-collared Swift
A very large swift (20-22 cm, wingspan 45-55 cm) with a bold white collar band, the largest New World swift. Found from Mexico to southern Brazil and the Caribbean. Aerial insectivore, foraging in large, noisy flocks over forests and cities. Nests behind waterfalls and in caves.