Is A Colt A Boy Or A Girl?

From Wikipedia, the free encyclopedia
A colt is a young male horse, under the age of four. The term "colt" is often confused with foal, which refers to a horse of either sex under one year of age.
An adult male horse if left intact is called either a "stallion" or a horse (sometimes full horse); if castrated, it is called a gelding. A young male horse is usually called a colt until age four, even if he is gelded.[citation needed] A rig or ridging is a horse or colt with a retained testicle or one which has been incompletely castrated.[1]
A young female horse is called a filly until age four, and a mare thereafter.
In the wild, colts are driven from their herds by the herd stallion somewhere between the age of one and two. Some scientists[who?] even believe that this may be in part an instinct to prevent inbreeding. When driven out, they usually join with other young stallions in a bachelor herd. They stay with this band until they are mature enough to form their own herd of mares.