Gadwall

について

カドワール。ユーラシア大陸と北アメリカに広く分布するカモ。雄は灰褐色の体と黒い尾部が特徴的。体長46〜56cm。湖や池、湿地に生息。植物性の食物を好む雑食性。北半球で繁殖し南へ渡る。低危険種。

Physical Description

Measurement	Value	Imperial
翼開長	50.3 cm	19.8 in
体重	857.5 g	30.25 oz

識別

羽毛

Males have finely vermiculated gray-brown plumage with black rump and undertail. White speculum patch diagnostic in flight. Females mottled brown like Mallard but smaller and with orange-sided bill. Subtle but elegant.

Habitat & Range

Freshwater lakes, reservoirs, marshes, and rivers with emergent vegetation across Eurasia and North America. Winters on large open wetlands and coastal estuaries. Range and population increasing in Europe.

🌿 Wetland 🌾 Grassland 🏖️ Coastal

分布域

Found year-round in Australia and New Zealand; nomadic in arid Australia, following temporary rainfall-fed wetlands.

Diet & Feeding

Dabbles for seeds and aquatic invertebrates; diet shifts toward invertebrates in spring; forages in shallow tropical wetlands.

保全状況

Least Concern

IUCN Red List

行動と繁殖

営巣

Nest type: SC. Incubation: 21-27 days. Fledging: 48-63 days.

一腹卵数

5-15

鳴き声

さえずり

Male utters a soft, nasal nheck note; female produces a series of descending, quacking notes. Both sexes are relatively quiet; female's quacking is softer and less strident than a Mallard.

分類学

Kingdom	Animalia
Phylum	Chordata
Class	Aves
目	Anseriformes (Waterfowl)
科	Anatidae (Ducks, Geese & Swans)
Genus	Mareca
種	Mareca strepera

Distribution

Gadwall has been recorded in 7 countries.

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生息あり Not recorded

countries highlighted

🇹🇼 Taiwan 🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden 🇺🇸 United States 🇨🇴 Colombia

External Databases

よくある質問

What does the Gadwall eat?

Dabbles for seeds and aquatic invertebrates; diet shifts toward invertebrates in spring; forages in shallow tropical wetlands.

Where does the Gadwall live?

Freshwater lakes, reservoirs, marshes, and rivers with emergent vegetation across Eurasia and North America. Winters on large open wetlands and coastal estuaries. Range and population increasing in Europe.

Is the Gadwall endangered?

The Gadwall has a conservation status of Least Concern.

How does the Gadwall nest?

Nest type: SC. Incubation: 21-27 days. Fledging: 48-63 days.

What does the Gadwall sound like?

Male utters a soft, nasal nheck note; female produces a series of descending, quacking notes. Both sexes are relatively quiet; female's quacking is softer and less strident than a Mallard.

How big is the Gadwall?

The Gadwall has a wingspan of 50.3 cm, weight of 857.5 g.

What order and family does the Gadwall belong to?

The Gadwall (Mareca strepera) belongs to the order Anseriformes and the family Anatidae.