Filly

A filly is a female horse, specifically one which has not reached sexual maturity. This usually means it is under 24 months of age. After it reaches maturity it is known as a mare.

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In Thoroughbred horse racing, the definitions of "filly" and "mare" are slightly different. In this context, female horses are not classified as "mares" until they are five-year-olds—more precisely, on the fifth January 1 (for horses born in the Northern Hemisphere) or July 1 (for horses born in the Southern Hemisphere) after their actual date of birth. Harness racing sets the cutoff age for "mares" as four years.

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The equivalent male is a colt. When either are very young they can also be referred to as foals.

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Female: Female is the sex of an organism, or a part of an organism, which produces egg cells. The "egg cell" (ovum) is defined as the larger gamete in a heterogamous reproduction system, while the smaller, usually motile gamete (sperm cell) is produced by the male. A female individual cannot reproduce sexu...

Horse: :This article discusses ungulate mammals. For other meanings of horse, see Horse (disambiguation)....

Mare: In English, a mare (an old Germanic word) is a female horse; the word is also an etymological root of marshall (originally a 'horse servant').In geography:Mare is an atoll in the Loyalty Islands.Mare means sea in both Latin and Italian.In Astronomy, the term is used for large features on planets etc...