Archbold's Nightjar vs Cayenne Nightjar
Eurostopodus archboldi compared with Setopagis maculosa
Side-by-Side Comparison
| Attribute | Archbold's Nightjar | Cayenne Nightjar |
|---|---|---|
| Scientific Name | Eurostopodus archboldi | Setopagis maculosa |
| Order | Caprimulgiformes | Caprimulgiformes |
| Family | Caprimulgidae | Caprimulgidae |
| Conservation Status | Least Concern | Data Deficient |
| Length | — | — |
| Wingspan | 41.0 cm (16.1 in) | 27.8 cm (10.9 in) |
| Weight | 77.0 g (2.72 oz) | 47.0 g (1.66 oz) |
| Diet | Aerial insectivore; catches moths and beetles in nocturnal flight over New Guinea montane forest. | Catches flying insects in aerial pursuit at night over South American forest and scrub. |
| Clutch Size | 1 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Archbold's Nightjar
Rarely recorded; presumed churring nocturnal song; low, resonant trilling typical of genus; vocalizations scarcely documented from highland New Guinea
Cayenne Nightjar
Poorly known vocalizations; presumed churring trill based on genus; extremely rare recordings; distinct from other Setopagis by subtle tonal and rhythm differences
Geographic Range & Migration
Archbold's Nightjar
Resident of montane forest in central New Guinea (Snow Mountains and Star Mountains) above 1,500 m; very poorly known.
Cayenne Nightjar
Known from a few specimens from French Guiana; possibly a rare resident of coastal forest and scrub; poorly known.
Conservation Status
Archbold's Nightjar
Cayenne Nightjar
How to Tell Them Apart
Archbold's Nightjar
Brown and dark grey with rufous-buff vermiculations; whitish throat patch; pale buff supercilium contrasts with darker crown; no white wing or tail patches; tail barred; New Guinea highlands; few records.
Cayenne Nightjar
Brown and buff mottled above with dark vermiculations; pale buff below with darker barring; white throat patch in male; outer tail spots white; data deficient; known from only a handful …
About These Birds
Archbold's Nightjar
A small Caprimulgidae nightjar (~77 g) known from subalpine grasslands and forest margins in the interior mountains of New Guinea. Named after naturalist Richard Archbold. Cryptic brown-patterned plumage. Nocturnal insectivore. Infrequently observed; biology largely undescribed. Least Concern in its montane range.
Cayenne Nightjar
A small Caprimulgidae nightjar (~47 g) from coastal French Guiana and adjacent Suriname. Known from only a handful of specimens; biology essentially unknown. Mottled brown plumage presumed cryptic in leaf litter. Presumed nocturnal insectivore. Data Deficient due to extreme rarity of confirmed records in the wild.