Kauaʻi Conservation Atlas

Kauaʻi record · kba_bird_american_wigeon

American Wigeon

Mareca americana

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American Wigeon — Adults · male left, female right
American Wigeon — Adults · male left, female right · OpenAI image generation; Atlas deterministic typesetting · AI-generated artwork; no third-party photograph reproduced · Image source

About American Wigeon

The American Wigeon is a medium-sized dabbling duck with a compact body, short bluish-gray bill, and pointed tail. Breeding males have a broad white crown, a green patch sweeping behind each eye, and a gray body with contrasting black rear; females are warm brown with a grayish head and subtler facial pattern. Both sexes show pale forewings in flight. The male’s clear, whistled call is one of the easiest ways to locate a flock among other wintering waterfowl.

Wigeons use ponds, lakes, marshes, rivers, estuaries, bays, flooded fields, tidal flats, pastures, and grassy parks. They are more vegetarian than many dabbling ducks, grazing on land and nibbling or tipping up for leaves, stems, and seeds of aquatic and terrestrial plants. During the breeding season they add more insects, mollusks, and small crustaceans, especially when females need protein for egg production. Wintering birds often join mixed flocks and may take vegetation brought to the surface by diving ducks or coots.

Females nest on dry ground in tall grass or low shrubs, sometimes hundreds of feet from water. The nest is a shallow depression lined with grass, reeds, and down. A clutch can contain three to thirteen eggs, incubation lasts about twenty-two to twenty-eight days, and one brood is typical. Ducklings hatch covered in down and can leave the nest soon afterward, following the female to feeding habitat while they grow and develop flight feathers.

The American Wigeon is still common and is generally considered of relatively low conservation concern, though monitoring has documented long-term declines and reproduction varies with drought and wetland conditions. Loss or degradation of breeding and wintering wetlands remains an important pressure. In Hawaiʻi it is an uncommon nonbreeding visitor rather than a nesting species. The present Atlas record requires confirmation specifically for Kauaʻi, so local observations should be documented carefully and separated from the bird’s well-established continental life history.

Kauaʻi evidence

Bishop Museum island checklist (version 2, 2017) lists Kauaʻi status W: winter visitor. See original island table. A Hawaiʻi-level record is available, but the species needs a documented Kauaʻi observation before local ecological conclusions are drawn.

Occurrence evidence

bishop_island_checklist_2017

Names and classification

Scientific name
Mareca americana
Common names
American Wigeon
Family
Anatidae
Order
Anseriformes
Record type
Species

Kauaʻi occurrence and status

Kauaʻi occurrence
Kauaʻi documented: winter visitor (2017 island checklist)
Origin
Indigenous visitor
Conservation status
Not assessed
Evidence date
2026-09-13
Evidence limits
Island occurrence supported by the 2017 checklist; abundance and current year presence are not established here

Habitat and ecology

Habitats
Wetlands
Food and resource needs
Food and resources may include aquatic vegetation, seeds, algae, submerged plant material, aquatic invertebrates, mollusks, crustaceans, small fish, or planktonic prey according to foraging type
Reproduction
Breeding on Kauaʻi is not established; seasonal resting and foraging habitat may be relevant.
Shelter
Shelter and structure within wetlands.

Threats and conservation

Threats
Wetland habitat state, disease surveillance, and mixed-flock detectability
Conservation actions
Hold as direct Kawaiele waterfowl presence and deepen only when observation or profile evidence supports analysis
Monitoring
Document date, place, observer, habitat, behavior, and supporting media for any Kauaʻi observation.
Data gaps
Update island status with dated contemporary records · Specific Kauaʻi habitat and abundance need local evidence

Process and seasonal context

Seasonal timing
Nonbreeding Waterfowl Visitor
Seasonal description
American Wigeon (Mareca americana) is recorded as a winter visitor on Kauaʻi in the Bishop Museum's 2017 island checklist. This is a documented island occurrence, not a claim of an individual sighting in 2026.

Sources and further reading

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