Pallid Swift vs Cassin's Spinetail
Apus pallidus в сравнении с Neafrapus cassini
Side-by-Side Comparison
| Характеристика | Pallid Swift | Cassin's Spinetail |
|---|---|---|
| Научное название | Apus pallidus | Neafrapus cassini |
| Отряд | Caprimulgiformes | Caprimulgiformes |
| Семейство | Apodidae | Apodidae |
| Охранный статус | Least Concern | Least Concern |
| Длина | — | — |
| Размах крыльев | 33,4 cm (13.1 in) | 31,2 cm (12.3 in) |
| Масса | 42,25 g (1.49 oz) | 39,5 g (1.39 oz) |
| Питание | Aerial insectivore foraging continuously in flight, taking tiny flies, beetles, and ballooning spiders. | Catches aerial plankton of small insects and spiders in fast sweeping flight; roosts in rock … |
| Размер кладки | 1-4 | -- |
| Population Trend | — | — |
Habitat Comparison
Общие среды обитания
Нет
Pallid Swift only
Song & Call Comparison
Pallid Swift
Melodic, rolling trill with rich timbre; sustained musical phrase with slight variations on repeated delivery at dusk.
Cassin's Spinetail
Loud, penetrating screech followed by descending chatter; harsh staccato calls echoing through African forest understory.
Geographic Range & Migration
Pallid Swift
Breeds in the Mediterranean and North Africa east to Pakistan. Migratory; winters in sub-Saharan Africa from Senegal to Ethiopia.
Cassin's Spinetail
Found in Central and East Africa from Cameroon east to Kenya and Tanzania. Resident in lowland rainforest and gallery forest.
Охранный статус
Pallid Swift
Cassin's Spinetail
How to Tell Them Apart
Pallid Swift
Medium-large; pale brownish-grey overall, distinctly paler than Common Swift; larger pale throat patch; wing coverts show pale scaly edges; Mediterranean and Middle Eastern species; pale sandy-brown tone separates it from …
Cassin's Spinetail
Medium-large; dark blackish-brown upperparts; white rump patch; pale whitish underparts; very short stubby spinetail; Central African forest species; short rounded tail with spiny tips distinctive; larger and broader-winged than smaller …
About These Birds
Pallid Swift
A medium-sized swift (16-17 cm) similar to Common Swift but paler, sandy-brown overall with a larger white throat patch. Found across southern Europe, North Africa, and the Middle East. Aerial insectivore. Long-distance migrant wintering in sub-Saharan Africa and South Asia.
Cassin's Spinetail
A medium-sized swift (13-14 cm) of lowland tropical forests from Sierra Leone to Uganda. Dark plumage with a white belly patch. Spine-tipped tail feathers. Aerial insectivore, foraging in rapid, bat-like flight over the forest canopy. Colonial nester in hollow trees.