Great Dusky Swift vs Böhm's Spinetail
Cypseloides senex 비교 대상 Neafrapus boehmi
Side-by-Side Comparison
| 속성 | Great Dusky Swift | Böhm's Spinetail |
|---|---|---|
| 학명 | Cypseloides senex | Neafrapus boehmi |
| 목 | Caprimulgiformes | Caprimulgiformes |
| 과 | Apodidae | Apodidae |
| 보전 상태 | Least Concern | Least Concern |
| 체장 | — | — |
| 날개 폭 | 33.8 cm (13.3 in) | 24.0 cm (9.4 in) |
| 체중 | 83.0 g (2.93 oz) | 16.225 g (0.57 oz) |
| 식성 | Feeds on aerial plankton of tiny insects and spiders; entire diet captured during non-stop aerial … | Aerial diet of small flying insects and spiders; forages at speed over forest and open … |
| 산란 수 | 1-2 | 2-3 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
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
Böhm's Spinetail
Soft, high twittering with delicate sibilant quality; rapid flutter of tiny notes almost insect-like in pitch and rhythm.
Geographic Range & Migration
Great Dusky Swift
Found in eastern South America from Venezuela and the Guianas south to Bolivia and Paraguay. Resident near rocky cliffs and waterfalls.
Böhm's Spinetail
Found in Central and East Africa from Cameroon east to Tanzania and Mozambique. Resident in open forest; often associated with baobab trees.
보전 상태
Great Dusky Swift
Böhm's Spinetail
How to Tell Them Apart
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 …
Böhm's Spinetail
Small; dark brown-black upperparts; white rump patch; pale whitish underparts; very short stubby tail with prominent spiny tips; East African savanna species; tiny bat-like fluttering flight aided by extremely short …
About These Birds
Great Dusky Swift
18–20 cm의 대형 칼새로 브라질 동남부·파라과이 동부·아르헨티나 북동부에 서식. 어두운 그을린 갈색 깃털. 삼림 협곡과 폭포 위를 날며 먹이를 구하는 공중 곤충식성. 폭포 뒤에 대규모 집단으로 둥지를 튼다. Cypseloides 속의 가장 큰 종.
Böhm's Spinetail
A small swift (9-10 cm) of miombo woodland and open savanna across eastern and southern Africa. Dark plumage with a white rump and belly. Short, spine-tipped tail. Aerial insectivore with distinctive fluttering, bat-like flight low over the treetops.