White-fronted Swift vs Alpine Swift
Cypseloides storeri в сравнении с Tachymarptis melba
Side-by-Side Comparison
| Характеристика | White-fronted Swift | Alpine Swift |
|---|---|---|
| Научное название | Cypseloides storeri | Tachymarptis melba |
| Отряд | Caprimulgiformes | Caprimulgiformes |
| Семейство | Apodidae | Apodidae |
| Охранный статус | Data Deficient | Least Concern |
| Длина | — | — |
| Размах крыльев | 27,4 cm (10.8 in) | 43,9 cm (17.3 in) |
| Масса | 39,25 g (1.38 oz) | 97,5 g (3.44 oz) |
| Питание | Obligate aerial insectivore; takes small flies, beetles, and aerial spiders in swooping fast-flight passes. | Aerial insectivore taking small flying insects and spiders; may forage at great heights following thermal … |
| Размер кладки | -- | 1-4 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
White-fronted Swift
Poorly known vocalizations; thin twittering presumed; calls over Mexican montane waterfalls; high-pitched soft chip notes; very rarely documented; data-deficient species
Alpine Swift
Rapid series of short, clipped whistles; bright, clean notes delivered in quick succession with occasional doubled phrase.
Geographic Range & Migration
White-fronted Swift
Endemic to western Mexico from Jalisco to Oaxaca. Resident in forested highlands near canyon streams at 1,000–2,500 m. Poorly known.
Alpine Swift
Breeds from southern Europe and North Africa east through Central Asia and the Himalayas to India. Migratory; winters in sub-Saharan Africa.
Охранный статус
White-fronted Swift
Alpine Swift
How to Tell Them Apart
White-fronted Swift
Blackish-brown throughout with a prominent white frontal patch on forehead and lores; no other pale markings; slightly paler brownish below; poorly known Mexican endemic known from very few specimens.
Alpine Swift
Large; dark brown upperparts; white throat patch separated from white belly by dark brown breast band; brown flanks; bold tricoloured underpart pattern; one of Europe's largest swifts with distinctive white …
About These Birds
White-fronted Swift
A medium-sized swift (14 cm) endemic to montane forests of western Mexico at 1,500-3,000 m elevation. Sooty-black plumage with a white forehead patch. Aerial insectivore feeding over forested mountainsides. One of the least known Neotropical swifts. Classified as Vulnerable.
Alpine Swift
A large swift (20-22 cm, wingspan 54-60 cm) with a white belly and throat contrasting with dark brown upperparts. Found from southern Europe and Africa to Central Asia. Aerial insectivore, foraging at great heights. Nests on cliff faces in large colonies. Powerful, fast flier.