Fernando Po Swift vs White-collared Swift
Apus sladeniae comparado com Streptoprocne zonaris
Side-by-Side Comparison
| Atributo | Fernando Po Swift | White-collared Swift |
|---|---|---|
| Nome científico | Apus sladeniae | Streptoprocne zonaris |
| Ordem | Caprimulgiformes | Caprimulgiformes |
| Família | Apodidae | Apodidae |
| Estado de conservação | Data Deficient | Least Concern |
| Comprimento | — | — |
| Envergadura | 35,4 cm (13.9 in) | 42,5 cm (16.7 in) |
| Peso | 42,0 g (1.48 oz) | 106,45 g (3.75 oz) |
| Dieta | Aerial insectivore relying entirely on flying insects (midges, gnats, small beetles) and airborne spiders. | Obligate aerial insectivore; gathers small flying insects, winged ants, and airborne spiders during flight. |
| Tamanho da postura | 1-2 | 2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Fernando Po Swift
Deep, resonant wingbeat audible alongside soft chips; quiet churring call barely distinguishable from surrounding ambient sounds.
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
Fernando Po Swift
Found on Bioko Island in the Gulf of Guinea and adjacent Cameroon highlands. Restricted to mountain forests and highland areas.
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.
Estado de conservação
Fernando Po Swift
White-collared Swift
How to Tell Them Apart
Fernando Po Swift
Dark sooty-brown overall; pale greyish throat and chin patch; underparts slightly paler; broadly similar to African Swift; data-deficient Bioko Island endemic; plumage details poorly documented from limited specimens.
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
Fernando Po Swift
A medium-sized swift (14-15 cm) found on the island of Bioko (formerly Fernando Po) in the Gulf of Guinea, Equatorial Guinea. Dark plumage. Aerial insectivore. A poorly known, range-restricted species limited to the volcanic island. Very limited ecological data available.
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.