Heinrich's Nightjar vs Malay Eared-nightjar
Eurostopodus diabolicus compared with Lyncornis temminckii
Side-by-Side Comparison
| Attribute | Heinrich's Nightjar | Malay Eared-nightjar |
|---|---|---|
| Scientific Name | Eurostopodus diabolicus | Lyncornis temminckii |
| Order | Caprimulgiformes | Caprimulgiformes |
| Family | Caprimulgidae | Caprimulgidae |
| Conservation Status | Least Concern | Least Concern |
| Length | — | — |
| Wingspan | 39.9 cm (15.7 in) | 41.0 cm (16.1 in) |
| Weight | 104.0 g (3.67 oz) | 95.0 g (3.35 oz) |
| Diet | Nocturnal aerial insectivore; catches moths and beetles in flight over Sulawesi forest; poorly known. | Nocturnal aerial insectivore; catches large moths and beetles in flight over SE Asian lowland forest. |
| Clutch Size | 1 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Shared Habitats
Heinrich's Nightjar only
None
Malay Eared-nightjar only
Song & Call Comparison
Heinrich's Nightjar
Haunting, hollow 'ku-WOO' repeated rhythmically; deep resonant quality; distinctive mournful whistle carrying through Sulawesi forest at night
Malay Eared-nightjar
Loud, repeated 'tock-tock-tock' or 'bonk-bonk'; hollow, wooden quality; carries well through lowland forest; alarm a sharp 'chek'; call accelerates toward end
Geographic Range & Migration
Heinrich's Nightjar
Endemic to Sulawesi, Indonesia; resident of montane forest; extremely rare and poorly known, with very few records.
Malay Eared-nightjar
Resident of lowland forest, forest edge, and secondary growth in Brunei, Malaysia, Sumatra, and Borneo, up to 600 m.
Conservation Status
Heinrich's Nightjar
Malay Eared-nightjar
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.
Malay Eared-nightjar
Brown and buff mottled with black vermiculations; distinctive long narrow ear-tufts projecting from crown; buff-white throat patch; no white wing spots; tail broadly barred brown and buff. Sexes similar.
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.
Malay Eared-nightjar
A medium Caprimulgidae nightjar (~95 g) of forest edges, secondary growth, and plantation margins in Sundaland, including the Malay Peninsula, Borneo, Sumatra, and the Philippines. Distinguished by small, inconspicuous ear tufts. Nocturnal aerial insectivore. Rarely observed; calls heard at night. Least Concern.