Forbes-Watson's Swift vs Great Dusky Swift
Apus berliozi 比較対象 Cypseloides senex
Side-by-Side Comparison
| 属性 | Forbes-Watson's Swift | Great Dusky Swift |
|---|---|---|
| 学名 | Apus berliozi | Cypseloides senex |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 34.0 cm (13.4 in) | 33.8 cm (13.3 in) |
| 体重 | 43.166666666666664 g (1.52 oz) | 83.0 g (2.93 oz) |
| 食性 | Obligate aerial feeder on small insects and arachnids; catches prey in a wide gape during … | Feeds on aerial plankton of tiny insects and spiders; entire diet captured during non-stop aerial … |
| 一腹卵数 | 2 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Forbes-Watson's Swift
Rapid, buzzy chatter descending at end; rough staccato notes spilling quickly with emphatic final chip before silence.
Great Dusky Swift
Loud, churring trill; harsher and louder than other Cypseloides; calls over Iguacu Falls and major Neotropical waterfalls; buzzy 'bzzzt-bzzzt' in aerial groups
Geographic Range & Migration
Forbes-Watson's Swift
Breeds in the Arabian Peninsula and East Africa from Somalia south to Tanzania. Partially migratory; range and taxonomy incompletely understood.
Great Dusky Swift
Found in eastern South America from Venezuela and the Guianas south to Bolivia and Paraguay. Resident near rocky cliffs and waterfalls.
保全状況
Forbes-Watson's Swift
Great Dusky Swift
How to Tell Them Apart
Forbes-Watson's Swift
Dark sooty-brown overall with pale buff throat patch; underparts slightly paler brown; Socotra Island and East African coast species; plumage similar to African Swift but slightly paler throat and restricted …
Great Dusky Swift
Very large; entirely dark sooty-brown with pale grey forehead and chin scaling; slightly paler underparts; broad wings; largest Cypseloides swift; South American waterfall specialist with dusky uniform plumage and imposing …
About These Birds
Forbes-Watson's Swift
ベルリョウアマツバメはソマリア周辺の東アフリカに生息する比較的希少なアマツバメである。
Great Dusky Swift
グレートダスキースウィフトはブラジルとアルゼンチンに分布し、大きな滝の周辺で繁殖するアマツバメである。