

Wood duck

Class: Aves
Order: Anseriformes
Family: Anatidae
Genus and Species: Aix sponsa
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Wood ducks are primarily found in eastern North America, as well as some parts of western North America. They have crested feathers on their heads. Males have iridescent green, blue and purple feathers, as well as two white lines that run from the bill around their red eyes to the back of their head.
Physical Description

Both adults have a crested head, white belly and a white line at the back of the wing, which is most easily seen while the bird is in flight. The male has iridescent green, blue, and purple feathers on its head, with two white lines that run parallel to each other from the base of the bill and behind the eye to the back of the head.

The male also has a white chin and throat, red eyes, red at the base of the bill, a deep rust-colored chest, bronze sides, and a black back and tail. In contrast, the female is gray-brown overall, with white eye rings and a white throat and chin.

Wood ducks measure 17-20 inches (43-51 centimeters) in length. 
Native Habitat

These ducks are mainly found along eastern North America. They are also in the west, from the northern two-thirds of California to southern British Columbia. Wood ducks prefer wooded swamps and river bottomlands. Natural cavities in trees serve as nests sites.

Unlike most other dabbling ducks, wood ducks do not have a stable home range. Their home range changes according to the rise and fall of floodwaters.

Males will vocalize in a thin, high, rising "jeeeeee." Females utter a drawn-out, rising squeal, "oo-eek," when flushed, and a sharp "cr-r-ek, cr-e-ek" for an alarm call.
Food/Eating Habits

Wood ducks feed in flooded timber or wooded swamps, eating the seeds of the trees that occupy these areas. They may also occasionally feed in fields, eating grains such as corn and wheat.

At the Smithsonian's National Zoo they eat sinking duck pellets, mealworms and chopped greens.

Reproduction and Development

Pairing for breeding begins as early as late October and continues through February, sometimes even into early spring. Wood ducks remain with their mates longer than most ducks, usually until the eggs are pipped.

The wood duck is a cavity nester, readily using manmade nest boxes when natural cavities are limited. Normal clutch size is six to 10 bone-white eggs. Females incubate the eggs for approximately 30 days, only leaving the nest twice a day. The young are precocial, meaning they are born relatively advanced and able to feed themselves almost immediately. They remain in the nest for just 24 hours after hatching.

In the early 1900s, overhunting nearly caused the wood duck's extinction. The 1918 Migratory Bird Treaty Act between the U.S. and Canada made it possible to give the wood duck complete protection and reduced hunting seasons through fall and early winter.

Currently hunting is not an issue, and the range of this duck is very large. There are no significant documented threats to this species, population numbers are increasing and it is well-represented in its historic range.

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