Fernando Po Swift vs White-chested Swift
Apus sladeniae в сравнении с Cypseloides lemosi
Side-by-Side Comparison
| Характеристика | Fernando Po Swift | White-chested Swift |
|---|---|---|
| Научное название | Apus sladeniae | Cypseloides lemosi |
| Отряд | Caprimulgiformes | Caprimulgiformes |
| Семейство | Apodidae | Apodidae |
| Охранный статус | Data Deficient | Least Concern |
| Длина | — | — |
| Размах крыльев | 35,4 cm (13.9 in) | 30,0 cm (11.8 in) |
| Масса | 42,0 g (1.48 oz) | 28,400000000000002 g (1.00 oz) |
| Питание | Aerial insectivore relying entirely on flying insects (midges, gnats, small beetles) and airborne spiders. | Obligate aerial forager catching small flies, aphids, winged termites, and airborne spiders on the wing. |
| Размер кладки | 1-2 | -- |
| 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-chested Swift
High, thin twittering; soft 'tsit' calls in flight; calls over Colombian waterfalls; very poorly known; thin, reedy contact notes; one of most rarely documented swifts
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-chested Swift
Known from Colombia and adjacent Ecuador. One of the world's rarest swifts; recorded at waterfalls in humid forest foothills at 500–1,200 m.
Охранный статус
Fernando Po Swift
White-chested 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-chested Swift
Black upperparts and wings; distinctive large white chest patch contrasting sharply with black throat and belly; white confined to central breast; Colombian endemic with unique bold bicoloured plumage unlike any …
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-chested Swift
A medium-sized swift (14-15 cm) endemic to the upper Cauca Valley of Colombia. Sooty-black plumage with a white breast patch. Aerial insectivore of subtropical forests. Classified as Endangered due to extremely restricted range and ongoing habitat loss.