![Mule deer buck gives a smile Mule deer buck gives a smile](https://photos.smugmug.com/Tonys-Takes/n-hsSJf/2021/12-31-2021-Arsenal-Deer-and-Bison/i-VX5zNQn/0/0fc98549/X4/20211231%2007-23-53%200061-Edit-X4.jpg)
No, not really a smile but it kind of looks like it. The deer rut is pretty much over but there are still some lingering signs of it. I am still occasionally seeing some bucks sparring and in this case, see them sniffing the ladies.
This handsome brute is displaying the flehmen response, a curling of the lips and opening of the mouth that allows it to get a nice, big whiff of scents. It is much like you or I take a big whiff with our nose.