Bates's Swift vs White-collared Swift
Apus batesi в сравнении с Streptoprocne zonaris
Side-by-Side Comparison
| Характеристика | Bates's Swift | White-collared Swift |
|---|---|---|
| Научное название | Apus batesi | Streptoprocne zonaris |
| Отряд | Caprimulgiformes | Caprimulgiformes |
| Семейство | Apodidae | Apodidae |
| Охранный статус | Least Concern | Least Concern |
| Длина | — | — |
| Размах крыльев | 24,6 cm (9.7 in) | 42,5 cm (16.7 in) |
| Масса | 22,1 g (0.78 oz) | 106,45 g (3.75 oz) |
| Питание | Entirely airborne feeder on tiny flies, gnats, and airborne arachnids; one of the most aerial … | Obligate aerial insectivore; gathers small flying insects, winged ants, and airborne spiders during flight. |
| Размер кладки | 2 | 2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Bates's Swift
Rapid, light twittering with bright crystalline quality; cascading series of high pure notes tumbling freely in open air.
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
Bates's Swift
Found in a restricted range in West and Central Africa from Cameroon and Gabon. Resident in lowland rainforest. Rare and poorly known.
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.
Охранный статус
Bates's Swift
White-collared Swift
How to Tell Them Apart
Bates's Swift
Small; dark sooty-brown overall; narrow pale greyish-white rump band; pale greyish chin; underparts dark brown; forked tail; West African forest species; the narrowest and dullest rump band among African white-rumped …
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
Bates's Swift
A medium-sized swift (16-17 cm) found in lowland and montane forests of West and Central Africa. Dark plumage with a greenish gloss. Aerial insectivore. Colonial breeder. One of the least known African swifts due to its forest habitat. Named after George Latimer Bates.
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.