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Litter (animal)
- ''For other meanings of litter, see Litter (disambiguation).''
A '''litter''' is the offspring at one birth of animals from the same mother and usually from one set of parents. The word is most often used for the offspring of mammals, but can be used for any animal that gives birth to multiple young. In comparison, a group of egg (biology)|eggs and the offspring that hatch from them are frequently called a '''clutch (animal)|clutch''', whilst young birds are often called a '''offspring|brood'''.
Animals from the same litter are referred to as littermates.
Animals frequently display grouping behaviour in herds, swarms, flocks, or Colony (biology)|colonies, and these multiple births derive similar advantages. A litter offers some protection from predation, not particularly to the individual young but to the parents' investment in breeding. With multiple young, predators could eat several and others could still survive to reach maturity, but with only one offspring, its loss could mean a wasted breeding season. The other significant advantage is the chance for the healthiest young animals to be favoured from a group. Rather than it being a conscious decision on the part of the parents, the fittest and strongest baby competes most successfully for food and space, leaving the weakest young, or runts, to die through lack of care.
In the wild, only a small percentage, if any, of the litter may survive to maturity, whereas for domesticated animals and those in captivity with human care the whole litter might survive.
Category:Zoology
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