Archbold's Nightjar vs White-tailed Nightjar
Eurostopodus archboldi comparado com Hydropsalis cayennensis
Side-by-Side Comparison
| Atributo | Archbold's Nightjar | White-tailed Nightjar |
|---|---|---|
| Nome científico | Eurostopodus archboldi | Hydropsalis cayennensis |
| Ordem | Caprimulgiformes | Caprimulgiformes |
| Família | Caprimulgidae | Caprimulgidae |
| Estado de conservação | Least Concern | Least Concern |
| Comprimento | — | — |
| Envergadura | 41,0 cm (16.1 in) | 27,3 cm (10.7 in) |
| Peso | 77,0 g (2.72 oz) | 35,75 g (1.26 oz) |
| Dieta | Aerial insectivore; catches moths and beetles in nocturnal flight over New Guinea montane forest. | Aerial insectivore; catches moths, beetles, and flying insects at night over South American open and … |
| Tamanho da postura | 1 | 2 |
| Population Trend | — | — |
Habitat Comparison
Habitats partilhados
Nenhum
Archbold's Nightjar only
White-tailed Nightjar only
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
White-tailed Nightjar
Rapid, whirring trill; 'churrrr' repeated with nasal quality; calls from open savanna and grassland at dusk; alarm a sharp bark; males display low over ground
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.
White-tailed Nightjar
Resident of open savanna and forest edge from Costa Rica through Colombia and Venezuela to the Guianas and northern Brazil; also Caribbean islands.
Estado de conservação
Archbold's Nightjar
White-tailed 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.
White-tailed Nightjar
Male brown and grey mottled; white outer tail feathers diagnostic; white throat; small white wing spots; female has buff outer tail feathers and lacks white wing spots; scrubby savanna habitats.
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.
White-tailed Nightjar
O bacurau-de-rabo-branco é um bacurau noturno sul-americano com cauda caracteristicamente branca nos machos, encontrado em savanas e áreas abertas da América do Sul.