Nyanza Swift vs White-collared Swift
Apus niansae в сравнении с Streptoprocne zonaris
Side-by-Side Comparison
| Характеристика | Nyanza Swift | White-collared Swift |
|---|---|---|
| Научное название | Apus niansae | Streptoprocne zonaris |
| Отряд | Caprimulgiformes | Caprimulgiformes |
| Семейство | Apodidae | Apodidae |
| Охранный статус | Least Concern | Least Concern |
| Длина | — | — |
| Размах крыльев | 31,0 cm (12.2 in) | 42,5 cm (16.7 in) |
| Масса | 32,4 g (1.14 oz) | 106,45 g (3.75 oz) |
| Питание | Obligate aerial forager; feeds entirely on the wing on small flying insects, midges, and airborne … | Obligate aerial insectivore; gathers small flying insects, winged ants, and airborne spiders during flight. |
| Размер кладки | 1-3 | 2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Nyanza Swift
High, thin sibilant trill with insect-like quality; barely perceptible rapid modulation of a single high-pitched note.
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
Nyanza Swift
Found in East Africa from Ethiopia and Sudan south to Uganda and Kenya. Resident or intra-African migrant in open savanna near Lake Victoria.
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
Nyanza Swift
White-collared Swift
How to Tell Them Apart
Nyanza Swift
Dark sooty-brown overall; pale whitish chin and throat patch; underparts slightly paler brown; moderately forked tail; East African species similar to Common Swift but slightly paler below with a subtly …
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
Nyanza Swift
A medium-sized swift (14-15 cm) found in highland areas of East Africa from Sudan to Tanzania. Dark plumage with a white belly patch. Aerial insectivore. Often seen in mixed flocks with other swift species over montane grassland. Sometimes considered a subspecies of African Swift.
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.