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You described a young deer called a fawn. White tail deer.
heard
deer with a white tail
The white-tail deer belongs to the family Cervidae.
Northern and North Central Idaho have white tail deer.
whitetail deer
Yes a white-tailed deer is a type of deer
When they're growing them, yes. By the way, "horns" on deer are actually called "antlers."
White tail deer can live anywhere on the northern side of the Earth.
White tail deer are mammals. All mammals are warm blooded.
The tail of a deer is called a tail.