Deer Science: Whitetail Buck’s Pineal Gland
My friends over at North American Whitetail magazine just published this article on the Science of the Whitetail Rut by deer researcher Clint McCoy. Among many other interesting rut things, Clint talks about a topic we’ve never addressed here at Big Deer: the pineal gland, which lies close to the optic nerve in a buck's brain…variations in photo-period (amount of light each day) prompt the pineal gland to initiate hormonal reactions in a buck’s body. Clint first points out that the whitetail deer is a “short-day breeder.” After the summer solstice occurs on June 21, each day’s length begins to shorten, dropping to less than 11 hours a day in early to mid-November. He then writes, …as daily photo-period reduces [...]