Costa Rican Swift vs Great Dusky Swift
Chaetura fumosa comparado com Cypseloides senex
Side-by-Side Comparison
| Atributo | Costa Rican Swift | Great Dusky Swift |
|---|---|---|
| Nome científico | Chaetura fumosa | Cypseloides senex |
| Ordem | Caprimulgiformes | Caprimulgiformes |
| Família | Apodidae | Apodidae |
| Estado de conservação | Least Concern | Least Concern |
| Comprimento | — | — |
| Envergadura | 21,2 cm (8.3 in) | 33,8 cm (13.3 in) |
| Peso | 18,2 g (0.64 oz) | 83,0 g (2.93 oz) |
| Dieta | Entirely airborne feeder on tiny flies, gnats, and airborne arachnids; one of the most aerial … | Feeds on aerial plankton of tiny insects and spiders; entire diet captured during non-stop aerial … |
| Tamanho da postura | -- | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Costa Rican Swift
Thin, insect-like buzz alternating with soft clicks; delicate high trill delivered during swift wheeling flight over valleys.
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
Costa Rican Swift
Found along the Pacific slope of Costa Rica and Panama. Resident in lowland and foothill forest and forest edge below 1,000 m.
Great Dusky Swift
Found in eastern South America from Venezuela and the Guianas south to Bolivia and Paraguay. Resident near rocky cliffs and waterfalls.
Estado de conservação
Costa Rican Swift
Great Dusky Swift
How to Tell Them Apart
Costa Rican Swift
Small; uniformly dark sooty-brown with rump barely paler than dark back; underparts dark grey-brown; short spiny tail; Central American Pacific slope species; exceptionally dark and uniform compared to most Chaetura …
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
Costa Rican Swift
Andorinhão-da-Costa-Rica (Chaetura fumosa), 11–12 cm. Plumagem uniformemente escura com tonalidade marrom-fuliginosa, uropígio ligeiramente mais claro. Habita bordas de florestas úmidas e áreas costeiras da Costa Rica e Panamá. Captura insetos em voo ágil, frequentemente em grupos mistos.
Great Dusky Swift
A large swift (18-20 cm) of southeastern Brazil, eastern Paraguay, and northeastern Argentina. Dark sooty-brown plumage. Aerial insectivore, foraging over forested gorges and waterfalls. Nests in large colonies behind waterfalls. The largest member of the genus Cypseloides.