Spotted Nightjar vs Brown Nightjar

Eurostopodus argus 比較対象 Veles binotatus

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Side-by-Side Comparison

属性 Spotted Nightjar Brown Nightjar
学名 Eurostopodus argus Veles binotatus
Caprimulgiformes Caprimulgiformes
Caprimulgidae Caprimulgidae
保全状況 Least Concern Least Concern
体長
翼開長 42.7 cm (16.8 in) 29.8 cm (11.7 in)
体重 102.5 g (3.62 oz) 63.0 g (2.22 oz)
食性 Aerial insectivore; hawks large moths, beetles, and flying insects at dusk and dawn over Australian … Nocturnal aerial insectivore; catches moths and flying insects over West and Central African forest.
一腹卵数 1 --
Population Trend
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Habitat Comparison

共通生息地

Spotted Nightjar only

Brown Nightjar only

None

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Song & Call Comparison

Spotted Nightjar

さえずり

Loud churring 'good-lord-deliver-us' repeated at dusk; melodic bubbling quality; also emits hollow 'cow-cow-cow' series and soft frog-like croaking

Brown Nightjar

さえずり

Repeated 'pew-pew' or 'puu-puu'; mellow, hollow whistle from African rainforest; calls from dense canopy at night; soft and ventriloquial; alarm a sharp 'chik'

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Geographic Range & Migration

Spotted Nightjar

Resident and partial migrant of open woodland, grassland, and scrub across mainland Australia and migrating to New Guinea and Indonesia in winter.

Brown Nightjar

Resident of lowland and submontane forest edge and clearings in West and Central Africa from Sierra Leone and Liberia east to DR Congo and Uganda.

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保全状況

Least Concern

Spotted Nightjar

Least Concern

Brown Nightjar

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How to Tell Them Apart

Spotted Nightjar

羽毛

Cryptically mottled grey-brown, rufous, and black with intricate vermiculations; distinctive large white spots on wing coverts; white throat patch; no white in wings or tail. Sexes similar with slight pattern …

Brown Nightjar

羽毛

Uniform dark rufous-brown with fine dark vermiculations; small pale buff wing spots; no white throat patch; no white tail markings; monotypic; very cryptic plumage matched to dark rainforest bark; West …

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About These Birds

Spotted Nightjar

オーストラリア本土のスピニフェックス草原に生息するヨタカで、体重103g。

Brown Nightjar

A medium-small Caprimulgidae nightjar (~63 g) of lowland and secondary forest in equatorial West Africa from Sierra Leone to Uganda. Uniformly dark brown above with a small white throat spot; plain compared with many nightjars. Nocturnal insectivore of forest understorey. Least Concern in its equatorial forest range.

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