Saturday, April 06, 2013
Gular Fluttering 8:00 am 4-6-13
Owls don't have sweat glands so to cool off from the heat or stress, they pant. This is called "gular fluttering." Their gular sac (kind of a throat pouch) is pumped in and out, moving air in and out and cooling them. A really hot owl will also slick down it's feathers (so they don't hold so much warm air), and a really, really hot owl will also droop its wings to get air movement in the wingpits for additional cooling. The gular sac is also expanded during hooting, when the bill is shut.