White-naped Swift vs White-collared Swift
Streptoprocne semicollaris مقارنةً بـ Streptoprocne zonaris
Side-by-Side Comparison
| السمة | White-naped Swift | White-collared Swift |
|---|---|---|
| الاسم العلمي | Streptoprocne semicollaris | Streptoprocne zonaris |
| الرتبة | Caprimulgiformes | Caprimulgiformes |
| الفصيلة | Apodidae | Apodidae |
| حالة الحفاظ | Least Concern | Least Concern |
| الطول | — | — |
| طول الجناح | 44,4 cm (17.5 in) | 42,5 cm (16.7 in) |
| الوزن | 175,0 g (6.17 oz) | 106,45 g (3.75 oz) |
| النظام الغذائي | Exclusively aerial insectivore catching small flying insects and spiders drifting in aerial plankton at altitude. | Obligate aerial insectivore; gathers small flying insects, winged ants, and airborne spiders during flight. |
| عدد البيض في الوضع | 2 | 2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
White-naped Swift
Very loud screaming trill; deep, powerful 'shreee' from Mexico's largest swift; calls over cliffs and canyons; impressive volume; deeper than White-collared Swift
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
White-naped Swift
Endemic to Mexico from Nayarit south to Oaxaca. Found in montane forest and canyons at 1,000–3,000 m. Nests behind waterfalls.
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.
حالة الحفاظ
White-naped Swift
White-collared Swift
How to Tell Them Apart
White-naped Swift
Very large; entirely black with white patch restricted to nape only, not forming a full collar; large square tail; Mexican endemic and the largest swift in Middle America; white nape …
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
White-naped Swift
A large swift (20-22 cm) endemic to Mexico, found in montane regions from Nayarit to Guerrero. Dark plumage with a white half-collar on the nape. Aerial insectivore, foraging over pine-oak forests and barrancas. Nests in large cave colonies. Near Threatened due to limited range.
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.