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Side-by-Side Comparison

属性	Blue Bustard	Karoo Bustard
学名	Eupodotis caerulescens	Heterotetrax vigorsii
目	Otidiformes	Otidiformes
科	Otididae	Otididae
保全状況	Near Threatened	Least Concern
体長	—	—
翼開長	64.6 cm (25.4 in)	68.4 cm (26.9 in)
体重	1370.4 g (48.34 oz)	1560.0 g (55.03 oz)
食性	Feeds on insects, small vertebrates, seeds, and forbs in South African grassland. Beetles and grasshoppers …	Omnivore of open grasslands, eating insects, small vertebrates, seeds, and green shoots. Beetles and grasshoppers …
一腹卵数	1-3	1-2
Population Trend	—	—

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Habitat Comparison

共通生息地

🌾 Grassland

Blue Bustard only

None

Karoo Bustard only

None

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Song & Call Comparison

Blue Bustard

さえずり

Loud, low booming call; deep resonant notes carrying impressively across open dry savanna at dawn. Vocalization pattern typical of this species in its native habitat.

Karoo Bustard

さえずり

Loud, low booming call; deep bass resonance carrying well across open dry African plains and grassland.

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Geographic Range & Migration

Blue Bustard

Endemic to the grasslands of southern South Africa from the Eastern Cape to KwaZulu-Natal. Near Threatened.

Karoo Bustard

Endemic to the Karoo semi-desert of southern South Africa and southern Namibia. Resident in arid scrubland.

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保全状況

Near Threatened

Blue Bustard

Least Concern

Karoo Bustard

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How to Tell Them Apart

Blue Bustard

羽毛

Jamaican Lizard-cuckoo: brown above; rufous below; very long graduated tail; red orbital ring; yellow bill; Jamaica endemic species

Karoo Bustard

羽毛

Cuban Lizard-cuckoo: brown above; buff below; very long graduated tail; red facial skin; yellow bill; Cuba endemic species; slender

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About These Birds

Blue Bustard

南アフリカの草地に生息するノガンで、青灰色の羽毛が特徴。準絶滅危惧種に指定されている。

Karoo Bustard

ボーリーズノガン（Heterotetrax vigorsii）は南アフリカの乾燥草原・カルー・低木地に生息するノガン科の中型ノガン（体長45〜55 cm）。縞模様の褐色と黒の羽衣が特徴。現地のカルー生態系の固有種。絶滅危惧種；農業・生息地の転換が脅威。

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