Wood DuckAix sponsa出会える場所と時期

The Wood Duck is a North American waterfowl species known for the male's striking plumage and its close association with wooded wetlands. It occurs throughout much of the Mississippi River basin, where floodplain forests and sheltered backwaters provide important habitat. Unlike many familiar ducks, it normally nests in tree cavities rather than on the ground. Heavy hunting and habitat loss caused major historical declines, but hunting regulations, wetland conservation, and nest boxes helped populations recover. Its presence reflects the value of retaining both wetlands and mature trees along river corridors.

Size

47–54 cm (18.5–21 in) long; wingspan 66–73 cm (26–29 in).

Weight

454–862 g (1–1.9 lb).

Lifespan

Often around 3–4 years in the wild, though banded individuals have lived more than 20 years.

Status

Least Concern (IUCN).

Wood Ducks are agile fliers that can maneuver through wooded habitats. They swim and feed in shallow water, often dabbling at the surface or tipping forward to reach food below. They also forage on land and readily perch on branches. Pairs commonly form before the breeding season, and males court females with displays and calls. The female selects a cavity and lines the nest with down. Soon after hatching, the ducklings climb to the entrance and jump to the ground or water when their mother calls. The female leads them to feeding areas, where they feed themselves under her protection. Northern populations migrate south as wetlands freeze, while some birds in warmer regions remain year-round.

• Strong claws help Wood Ducks grip bark and perch on branches.
• Ducklings leave their elevated nest by jumping before they can fly.
• Females sometimes lay eggs in another Wood Duck's nest.
• Wood Ducks can raise two broods in a year, especially in southern parts of their range.

Wildlife opportunities depend on the river reach, water levels and species. River-specific viewing months have not been confirmed; general species seasons are not a local sighting forecast.

Wood Ducks favor wooded swamps, freshwater marshes, beaver ponds, and slow-moving streams. Along the Mississippi, they are especially associated with floodplain forests, oxbow lakes, sloughs, and quiet side channels. They generally prefer sheltered water with overhanging vegetation and abundant cover rather than exposed main-channel reaches. Large trees with suitable cavities provide natural nesting sites, sometimes well away from water. Well-maintained nest boxes can supplement these sites where appropriate wetland habitat remains.

Wood Ducks eat seeds, fruits, aquatic plants, and a variety of invertebrates. Acorns and other tree seeds are important foods, particularly in autumn and winter. They also take insects, snails, and other small aquatic animals. Ducklings rely heavily on protein-rich invertebrates during early growth, while adult diets vary with season and local food availability.

Common name

Wood Duck

Scientific name

Aix sponsa

Animal group

Birds

Size

47–54 cm (18.5–21 in) long; wingspan 66–73 cm (26–29 in).

Weight

454–862 g (1–1.9 lb).

Lifespan

Often around 3–4 years in the wild, though banded individuals have lived more than 20 years.

Status

Least Concern (IUCN).

Identification

The breeding male has an iridescent green and purple crested head, crisp white facial markings, a red eye, a chestnut breast, and pale golden-buff sides. The female is gray-brown with a modest crest and a conspicuous white teardrop-shaped patch around the eye. Both sexes have a relatively long, broad tail and a boxy head that help distinguish them from many other ducks. Males become less colorful after breeding, so head shape, the red eye, and remaining facial markings can be useful clues.