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In areas south of the breeding grounds, blue-winged teal are more active in courtship during the spring migration than are most other ducks. [13] Blue-winged teal are among the last dabbling ducks to nest, [13] generally nesting between April 15 and May 15. [13] [18] Few nests are started after mid-July. [13]
The mallard (/ ˈ m æ l ɑːr d, ˈ m æ l ər d /) or wild duck (Anas platyrhynchos) is a dabbling duck that breeds throughout the temperate and subtropical Americas, Eurasia, and North Africa. It has been introduced to New Zealand , Australia , Peru , Brazil , Uruguay , Argentina , Chile , Colombia , the Falkland Islands , and South Africa .
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. The broods commonly start to mix with other females' broods as they become more independent or are abandoned by their mothers. [14]
The ducks, primarily cavity nesters, prefer the confines of a hollow tree but will nest on the ground when necessary. They also make use of chimneys, abandoned buildings, or nest boxes, the latter having been increasingly provided to them over recent decades, especially in southeast Texas and Mexico. Ducklings leap from nest cavities within two ...
One priority consideration when managing wooded habitat for cavity nesting ducks, is to maintain a sufficient population of mature trees in which suitable nesting cavities would be plentiful. [17] In addition these ducks do make use of artificial nest boxes when available. [18]
[16] [19] Young green-winged teal have the fastest growth rate of all ducks. [16] The males leave the females at the start of incubation and congregate on safe waters to molt. Some populations undergo an extensive molt migration while others remain on or near breeding grounds. Females molt on breeding grounds. [21]
Most duck species breed once a year, choosing to do so in favourable conditions (spring/summer or wet seasons). Ducks also tend to make a nest before breeding, and, after hatching, lead their ducklings to water.
Ring-necked duck pairs start during spring migration. Unpaired ducks showing up on breeding grounds will most likely end up being non-breeders. The pairs stay together only for reproduction, after that, they separate. The nest is bowl-shaped, built on water in dense emergent vegetation with sedges and woody plants.