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The female does all the incubating and is abandoned by the male about 1 to 2 weeks into incubation. The young remain in the nest for about 24–36 hours. Brood parasitism is quite common with other common goldeneyes, [ 13 ] and occurs less frequently with other duck species.
They can be distinguished from most ducks on size, shape, and the speculum. Separation from female common teal is problematic. In non-breeding (eclipse) plumage, the drake looks more like the female. It is a common duck of sheltered wetlands, such as taiga bogs, and usually feeds by dabbling for plant food or grazing. It nests on the ground ...
This duck nests in a tree cavity laying 9–11 cream-white eggs, similar to the Mandarin ducks. [10] The female incubates them while the male stands guard. Once the ducklings are ready to leave the nest, the female flies to the ground and the duckling will leap to the ground and follow their parents.
Nesting sites are typically on the ground, hidden in vegetation where the female's speckled plumage serves as effective camouflage, [90] but female mallards have also been known to nest in hollows in trees, boathouses, roof gardens and on balconies, sometimes resulting in hatched offspring having difficulty following their parent to water. [91]
After that, the male leaves the female to incubate and care for the brood. Females will actively seek out cavities in dead trees or artificial nest boxes such as those provided for nesting wood ducks. They prefer cavities 4–15 feet off the ground. Breeding occurs anytime between the end of February and the end of June, depending on the region.
Studies showed a strong fidelity in the nesting areas of surf scoters over the years. [20] The building of the nest usually starts in mid-May to early June and it occurs on the ground close to the sea, lakes or rivers, in woodland or tundra. Females dig a bowl-shaped nest in the ground and lines it with nearby ground debris and down. About 5 to ...
They are incubated by the female and hatch synchronously after around 25 days. When off the nest the female will cover the eggs with down. The young are precocial, nidifugous and can feed themselves. They fledge when aged 50–55 days. [21] Like many ducks, common pochards suffer a high rate of parasitic egg-laying, a behaviour also known as ...
The United States population is an estimated 3,000–4,000 nesting pairs [3] The spectacled eider molts at sea anywhere from 2 to 45 kilometers (1.2 to 28.0 mi) from the shore and north of 63°N. Since they are rarely seen outside of their breeding grounds, their wintering grounds in the Bering Sea were not known until recently [ 4 ] with the ...