Heinrich's Nightjar vs Bahian Nighthawk
Eurostopodus diabolicus compared with Nyctiprogne vielliardi
Side-by-Side Comparison
| Attribute | Heinrich's Nightjar | Bahian Nighthawk |
|---|---|---|
| Scientific Name | Eurostopodus diabolicus | Nyctiprogne vielliardi |
| Order | Caprimulgiformes | Caprimulgiformes |
| Family | Caprimulgidae | Caprimulgidae |
| Conservation Status | Least Concern | Least Concern |
| Length | — | — |
| Wingspan | 39.9 cm (15.7 in) | 25.4 cm (10.0 in) |
| Weight | 104.0 g (3.67 oz) | 41.0 g (1.45 oz) |
| Diet | Nocturnal aerial insectivore; catches moths and beetles in flight over Sulawesi forest; poorly known. | Aerial insectivore foraging over Brazilian rocky rivers and adjacent savanna; poorly known. |
| Clutch Size | 1 | 2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Heinrich's Nightjar
Haunting, hollow 'ku-WOO' repeated rhythmically; deep resonant quality; distinctive mournful whistle carrying through Sulawesi forest at night
Bahian Nighthawk
Thin, buzzy trilling call over Brazilian rivers; high-pitched 'tzeee-tzeee' series; calls in low flight over water; similar to Band-tailed but higher and sharper
Geographic Range & Migration
Heinrich's Nightjar
Endemic to Sulawesi, Indonesia; resident of montane forest; extremely rare and poorly known, with very few records.
Bahian Nighthawk
Endemic to northeastern Brazil (Bahia state); resident of open woodland and gallery forest along rivers; rare and localised.
Conservation Status
Heinrich's Nightjar
Bahian Nighthawk
How to Tell Them Apart
Heinrich's Nightjar
Rufous-brown and dark brown mottled with buff vermiculations; large pale buff throat patch; pale buff supercilium; no white wing markings; tail darkly barred brown and buff. Poorly known; Sulawesi endemic.
Bahian Nighthawk
Dark brown with buff and rufous speckles above; pale buff below with brown barring; white tail band; male with white throat patch; no white wing bar; recently described species from …
About These Birds
Heinrich's Nightjar
A medium Caprimulgidae nightjar (~104 g) endemic to the forest and forest-edge habitats of Sulawesi, Indonesia. Cryptically patterned brown-and-buff. Nocturnal insectivore; catches moths and beetles in aerial sallies. Little studied and rarely encountered in the field. Least Concern within its Sulawesi range.
Bahian Nighthawk
A small Caprimulgidae nighthawk (~41 g) of the São Francisco River valley in the state of Bahia, Brazil. Closely related to the Band-tailed Nighthawk; restricted to riverine habitats with open sandy banks. Roosts and forages near rocky rivers. Diet consists of small flying insects. Least Concern.