Christmas Island Boobook vs Snowy Owl

Ninox natalis 比較対象 Bubo scandiacus

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Side-by-Side Comparison

属性 Christmas Island Boobook Snowy Owl
学名 Ninox natalis Bubo scandiacus
Strigiformes Strigiformes
Strigidae Strigidae
保全状況 Vulnerable Vulnerable
体長 63.0 cm (24.8 in)
翼開長 38.0 cm (15.0 in) 145.0 cm (57.1 in)
体重 172.5 g (6.08 oz) 2100.0 g (74.08 oz)
食性 -- Primarily lemmings on the breeding grounds, where a pair may consume over 1,500 per year. …
一腹卵数 2 3-14
Population Trend
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Size Comparison

Body Length
Christmas Island Boobook
Snowy Owl 63.0 cm
翼開長
Christmas Island Boobook 38.0 cm
Snowy Owl 145.0 cm
体重
Christmas Island Boobook 172.5 g
Snowy Owl 2100.0 g
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Habitat Comparison

共通生息地

None

Christmas Island Boobook only

Snowy Owl only

Snowy Owl

Arctic tundra for breeding. Winters in open habitats resembling tundra, including prairies, airports, shorelines, and agricultural fields.

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Song & Call Comparison

Christmas Island Boobook

Snowy Owl

さえずり

Male gives a deep booming hoot 'hooooo' and a rising 'hoo-hoo' series. Also barks sharply when alarmed. Quieter than many owls; silent during long Arctic winter hunts.

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Geographic Range & Migration

Christmas Island Boobook

Snowy Owl

Circumpolar Arctic for breeding. Irruptive winter movements bring birds south to the northern United States, Europe, and Asia.

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保全状況

Vulnerable

Christmas Island Boobook

Vulnerable

Snowy Owl

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How to Tell Them Apart

Christmas Island Boobook

Snowy Owl

羽毛

Adult males are almost entirely white. Females and immatures have dark brown barring and spotting. Yellow eyes and fully feathered feet.

くちばし

Dark hooked bill mostly hidden by dense facial feathering

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About These Birds

Snowy Owl

The snowy owl is the heaviest North American owl and one of the most charismatic Arctic birds. Unlike most owls, it is largely diurnal, necessitated by the continuous daylight of Arctic summers. Snowy owl irruptions — periodic mass southward movements — are tied to lemming population cycles.

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Related Comparisons

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