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  2. Egg incubation - Wikipedia

    en.wikipedia.org/wiki/Egg_incubation

    A female mallard duck incubates her eggs. Egg incubation is the process by which an egg, of oviparous (egg-laying) animals, develops an embryo within the egg, after the egg's formation and ovipositional release. Egg incubation is done under favorable environmental conditions, possibly by brooding and hatching the egg.

  3. Radjah shelduck - Wikipedia

    en.wikipedia.org/wiki/Radjah_shelduck

    The radjah shelduck does not use nesting materials apart from some self-supplied down feathers. Egg-laying is usually completed by May or June, but depends on the extent of the wet season. The clutches range from 6 to 12 eggs. Incubation time is about 30 days.

  4. Broodiness - Wikipedia

    en.wikipedia.org/wiki/Broodiness

    Removing eggs each day, out of the sight of the hens, helps avoid broodiness not only in domestic poultry but also in some wild species in captivity. This continued egg laying means more eggs are laid than would occur under natural conditions. [9] [10] Poultry farming in battery cages also helps to avoid broodiness. [11] [12] [13]

  5. Crèche (zoology) - Wikipedia

    en.wikipedia.org/wiki/Crèche_(zoology)

    A group of female eider ducks and several ducklings In zoology , a crèche (from a French term for childcare ) is an animal behaviour where offspring are cared for as a group by multiple females. [ 1 ] [ 2 ] Many species such as common eiders , [ 1 ] lions , [ 2 ] and penguins [ 3 ] form crèches and exhibit group behaviours.

  6. Common goldeneye - Wikipedia

    en.wikipedia.org/wiki/Common_goldeneye

    Average egg size is a breadth of 42.6–44.0 mm (1.68–1.73 in), a length of 58.1–60.6 mm (2.29–2.39 in) and a weight of 61.2–66.6 g (2.16–2.35 oz). [2] The incubation period ranges from 28 to 32 days. The female does all the incubating and is abandoned by the male about 1 to 2 weeks into incubation.

  7. Mallard - Wikipedia

    en.wikipedia.org/wiki/Mallard

    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 .

  8. Brood patch - Wikipedia

    en.wikipedia.org/wiki/Brood_patch

    Brood patch of a sand martin. A brood patch, also known as an incubation patch, [1] is a patch of featherless skin on the underside of birds during the nesting season.Feathers act as inherent insulators and prevent efficient incubation, to which brood patches are the solution.

  9. Parental care - Wikipedia

    en.wikipedia.org/wiki/Parental_care

    Care of offspring by males may evolve when natural selection favouring parental care is stronger than sexual selection against paternal care. [8] In approximately 1% of bird species, males exclusively provide care after eggs are laid. [9] Male-only care is prevalent in a variety of organisms, including fish and amphibians.

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