Named for the white fur on the tail's underside, a Whitetail Deer uses the appendage like a flag to flash signals to other deer when it senses a threat. Besides this species, there are four other sub-species of Whitetail in Florida, such as the tiny Florida Key deer.
“Land Mammals - Deer.” Florida Fish And Wildlife Conservation Commission, Florida Fish And Wildlife Conservation Commission, myfwc.com/wildlifehabitats/profiles/mammals/land/deer/.