Wood ducks occupy a wide variety of habitats including woodland areas along lakes, rivers, creeks, beaver and farm ponds and various other freshwater vegetated wetland areas. Because wood ducks are cavity nesters, the availability of nesting sites within one mile of water is necessary. Winter habitats are the same as those used during breeding. (Hepp and Bellrose, 1995; "Wood Duck, Aix sponsa", 2000; "Wood Duck (Aix sponsa)", 1999)
Wood ducks are small to medium sized birds. Both male and female adults have a crest on their head, a rectangular shaped tail, white bellies and white lines on the back of the wings. Males are 48 to 54 cm long, while females are 47 to 51 cm long. Their wingspans are 70 to 73 cm long and they weigh between 500 and 700 g. The sexes are dimorphic. The males' heads are iridescent green, blue and purple and have two white lines that are parallel and run from the base of the bill and behind the eye to the back of the head. Male wood ducks also have red eyes, red at the base of the bill, rust-colored chests, bronze sides and black backs and tails. The females are brownish to gray and have white eye rings, white throats and gray chests. Juvenile wood ducks resemble adult females. Wood ducks are sometimes mistaken for American widgeons (Anas americana) when flying because the white lines that wood ducks have at the back of their wings are not visible. Also female wood ducks are mistaken for female Mandarin ducks (Aix galericulata). The difference lies in the Mandarin duck's lighter gray head and less distinctive eye patch. (Hepp and Bellrose, 1995; "Wood Duck, Aix sponsa", 2000)
Female wood ducks incubate their eggs for approximately 30 days. Ducklings hatch 6 to 18 hours after the first crack appears in their shells. They are precocial and leave the nest within 24 hours of hatching (the mother calls the ducklings out of the nest). The female makes sure that there are no predators in the area before the ducklings leave the nest. Once out of the nest, the ducklings scatter in search of food. The chicks become independent from their mothers after 56 to 70 days of care. Males do not care for the young. (Hepp and Bellrose, 1995; "Wood Duck, Aix sponsa", 2000)
We do not have information on home range for this species at this time.
Adult wood ducks have 12 calls, ducklings have 5. Most adult calls are used as warning calls and to attract mates. Both males and females have pre-flight calls. Females have calls that they use to locate their mate and to call their ducklings. Ducklings, who produce calls 2 to 3 days after hatching, have alarm, contact and threatening calls. By three months of age ducklings begin making some adult calls.
Wood ducks also have several courtship displays, such as the wing-and-tail-flash and mutual preening. In addition, they will display during agonistic interactions. (Hepp and Bellrose, 1995)
Wood ducks are omnivores. They feed on nuts, fruits, aquatic plants and seeds, aquatic insects and other invertebrates. The majority of their food includes acorns, hickory nuts, maple seeds, smart weeds, Diptera (true flies), Lepidoptera (butterflies and moths), Hemiptera (true bugs), Coleoptera (beetles), Isopoda (pillbugs and sowbugs), Decapoda (shrimp, crabs, and relatives), Trichoptera (caddisflies), Hymenoptera (wasps, bees, and ants), Odonata (dragonflies and damselflies), and Gastropoda (gastropods, slugs, snails). (Ehrlich, et al., 1988; Hepp and Bellrose, 1995; "Wood Duck (Aix sponsa)", 1999)
The most common predators of A.sponsa are great horned owls (Bubo virginianus), mink (Genus Mustela), raccoons (Procyon lotor), red foxes (Vulpes vulpes), gray foxes (Urocyon cinereoargenteus), alligators (Alligator mississippiensis) and black rat snakes (Pantherophis obsoletus). Female wood ducks have an alarm call that alerts the ducklings of the presence of a predator. The ducklings will search for cover in the water while the mother swims away from them or feigns a broken wing to protect them.
Within the first two weeks of hatching, 86 to 90 percent of the chicks die. A main cause of mortality is predation. (Hepp and Bellrose, 1995)
Wood ducks sometimes occupy hooded merganser (Lophodytes cucullatus) nests and when hooded merganser eggs are left in the nests, wood ducks incubate the merganser eggs as well as their own. This occurs more frequently early in the season. Wood ducks are also important prey for their predators and act as predators themselves. (Hepp and Bellrose, 1995)
There are no known adverse affects ofon humans.
As a result of hunting and habitat destructionwas near extinction in the early nineteen hundreds. Today, despite the fact that they are hunted, their population is thriving. Hunting laws have been put into place to protect them and man-made nest boxes are being created to counter their loss of habitat. Man-made nests are placed at least 600 feet apart in secluded areas where nests would occur naturally. They are made of wood, leaves and other material.
Alaine Camfield (editor), Animal Diversity Web.
Andrea Pope (author), University of Michigan-Ann Arbor, Phil Myers (editor), Museum of Zoology, University of Michigan-Ann Arbor.
living in the Nearctic biogeographic province, the northern part of the New World. This includes Greenland, the Canadian Arctic islands, and all of the North American as far south as the highlands of central Mexico.
uses sound to communicate
living in landscapes dominated by human agriculture.
having body symmetry such that the animal can be divided in one plane into two mirror-image halves. Animals with bilateral symmetry have dorsal and ventral sides, as well as anterior and posterior ends. Synapomorphy of the Bilateria.
uses smells or other chemicals to communicate
ranking system or pecking order among members of a long-term social group, where dominance status affects access to resources or mates
humans benefit economically by promoting tourism that focuses on the appreciation of natural areas or animals. Ecotourism implies that there are existing programs that profit from the appreciation of natural areas or animals.
animals that use metabolically generated heat to regulate body temperature independently of ambient temperature. Endothermy is a synapomorphy of the Mammalia, although it may have arisen in a (now extinct) synapsid ancestor; the fossil record does not distinguish these possibilities. Convergent in birds.
union of egg and spermatozoan
A substance that provides both nutrients and energy to a living thing.
offspring are produced in more than one group (litters, clutches, etc.) and across multiple seasons (or other periods hospitable to reproduction). Iteroparous animals must, by definition, survive over multiple seasons (or periodic condition changes).
marshes are wetland areas often dominated by grasses and reeds.
makes seasonal movements between breeding and wintering grounds
Having one mate at a time.
having the capacity to move from one place to another.
specialized for swimming
the area in which the animal is naturally found, the region in which it is endemic.
an animal that mainly eats all kinds of things, including plants and animals
reproduction in which eggs are released by the female; development of offspring occurs outside the mother's body.
Referring to something living or located adjacent to a waterbody (usually, but not always, a river or stream).
breeding is confined to a particular season
reproduction that includes combining the genetic contribution of two individuals, a male and a female
associates with others of its species; forms social groups.
a wetland area that may be permanently or intermittently covered in water, often dominated by woody vegetation.
uses touch to communicate
that region of the Earth between 23.5 degrees North and 60 degrees North (between the Tropic of Cancer and the Arctic Circle) and between 23.5 degrees South and 60 degrees South (between the Tropic of Capricorn and the Antarctic Circle).
Living on the ground.
uses sight to communicate
young are relatively well-developed when born
U.S. Department of Agriculture, Natural Resources Conservation Service, Madison, MS, and Wildlife Habitat Council. 1999. "Wood Duck (Aix sponsa)" (On-line). Northern Prairie Wildlife Research Center. Accessed March 29, 2004 at http://www.npwrc.usgs.gov/resource/1999/woodduck/woodduck.htm.
The Georgia Museum of Natural History and Georgia Department of Natural Resources. 2000. "Wood Duck, Aix sponsa" (On-line). Accessed March 29, 2003 at http://museum.nhm.uga.edu/gawildlife/birds/anseriformes/asponsa.html.
Alabama Game and Fish Division. 2002. "Wood Duck" (On-line). Private Forest Management Team. Accessed March 29, 2004 at http://www.pfmt.org/wildlife/somethings/wood_duck.htm.
Ehrlich, P., D. Dobkin, D. Wheye. 1988. The Birder's Handbook: A Field Guide to the Natural History of North American Birds. New York: Simon and Schuster.
Hepp, G., F. Bellrose. 1995. The Birds of North America. Philadelphia, PA: The American Ornithologist' Union and The Academy of Natural Sciences.
Ray, L. 2002. "Species: Aix sponsa, The North American Wood Duck" (On-line). Accessed March 18, 2003 at http://richland.uwc.edu/Dept/Biology/accounts/woodduck.htm.