Buck Science: Why Deer “Head Bob”
Dr. Karl Miller and other researchers at the University of Georgia did a study on the whitetail’s vision and confirmed 2 things: 1) a deer’s eyes are well adapted to detect even the slightest movement; and 2) to get a good 3-D look at a strange and stationary object that might present danger (like you standing in the woods or looking like a blob in a tree stand) a deer has to shift its head from side to side and bob it up and down and stare at it from several different angles. What it means as you're hunting: When a doe or buck looks your way, picks you out as a potential predator, and then starts the head ducking and bobbing, freeze. [...]