Biscutate Swift vs Black Spinetail
Streptoprocne biscutata compared with Telacanthura melanopygia
Side-by-Side Comparison
| Attribute | Biscutate Swift | Black Spinetail |
|---|---|---|
| Scientific Name | Streptoprocne biscutata | Telacanthura melanopygia |
| Order | Caprimulgiformes | Caprimulgiformes |
| Family | Apodidae | Apodidae |
| Conservation Status | Least Concern | Least Concern |
| Length | — | — |
| Wingspan | 38.4 cm (15.1 in) | 32.4 cm (12.8 in) |
| Weight | 106.67999999999999 g (3.76 oz) | 52.0 g (1.83 oz) |
| Diet | Aerial forager on tiny insects and wind-dispersed spiders; forages near water surfaces where insects concentrate. | High-speed aerial insectivore catching small flying insects and aerial spiders during fast sustained flight. |
| Clutch Size | 1-4 | -- |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Biscutate Swift
Loud, screeching trill; powerful 'schreeee' calls; similar to White-collared Swift but slightly lower; calls in large flocks over Brazilian mountains and waterfalls
Black Spinetail
Deep, resonant chattering with gravelly undertones; series of rough churring notes interspersed with sharp screaming calls.
Geographic Range & Migration
Biscutate Swift
Found in Brazil, Bolivia, and Paraguay in eastern South America. Resident in forest and open terrain; nests on rock faces.
Black Spinetail
Found in West and Central Africa from Nigeria and Cameroon east to Uganda. Resident in lowland rainforest and forest edge.
Conservation Status
Biscutate Swift
Black Spinetail
How to Tell Them Apart
Biscutate Swift
Large; blackish-brown with white collar interrupted at centre of nape creating two white patches rather than a complete ring; South American species readily distinguished from White-collared Swift by broken collar …
Black Spinetail
Large; entirely black plumage with slight gloss; black rump unlike white-rumped congeners; underparts dark; spiny tail; West African forest species; all-black coloration with no contrasting markings distinguishes it from all …
About These Birds
Biscutate Swift
A large swift (19-21 cm) similar to White-collared Swift but with two separated white breast patches. Found in southeastern Brazil, eastern Paraguay, and northeastern Argentina. Aerial insectivore, foraging over forested gorges. Nests behind waterfalls in large colonies.
Black Spinetail
A medium-sized spinetail swift (14-15 cm) of lowland rainforests in West and Central Africa. All-dark plumage. Spine-tipped tail for bracing against tree trunks. Aerial insectivore, foraging above the forest canopy. Nests inside hollow trees. Uncommon and seldom observed.