Black-Tailed Jackrabbit, Anza-Borrego Desert State Park, CaliforniaFeeling the heat, a black-tailed jackrabbit goes face to the sand and uses those big ears as heat regulators. The capillaries in the ears help to cool jackrabbits down on days like this one when it was 100 degrees plus in the Southern California desert. Nikon D800 with Nikkor 200-400mm lens (at 280mm) ISO 400, f/4 at 1/2000th of a second.