Bird breeding

Eggs of various birds, a [[turtle, various cartilaginous fish, a cuttlefish and various butterflies and moths. (Click on image for key)|right|thumb|link=File:Adolphe_Millot_oeufs-fixed.jpg#Key]]

the process by which certain oviparous (egg-laying) animals hatch their eggs

reproduction strategy used by an organism that relies on others to raise its young

nest for bird eggs

device to keep eggs warm

swiftlet bird nests made from saliva and harvested for human consumption

small, sharp, cranial protuberance used by offspring to break through the egg's surface during hatching

a set of display behaviors in which an animal, usually a male, attempts to attract a mate

large congregation of birds at a particular location

mating behavior in certain animals

patch of featherless skin

grouping of eggs in a nest

thumb|upright=.8|Fledging stage of the northern mockingbird (Mimus polyglottos) Fledging is the stage in a flying animal's life between hatching or birth and becoming capable of flight. This term is most frequently applied to birds, but is also used for bats. For altricial birds, those that spend more time in vulnerable condition in the nest, the nestling and fledging stage can be the same. For precocial birds, those that develop and leave the nest quickly, a short nestling stage precedes a longer fledging stage.

classification of birds based on the condition of the young after hatching

thumb|250px|Yellow-faced honeyeater chicks

component of avian reproduction

steep cliffs with nesting locations for bird colonies

medical condition in birds or other egg-laying animals, where the female is unable to pass an egg that has formed