Youve heard about them, or even experienced them up close - the phenomenon of animals who cant resist a shiny bumper. Mostly deer, but weve heard about bears, crocodiles, and even mountain lions.We cant guarantee that these little whistles will prevent them from jumping into the road, but theyre certainly worth a try! A pair of these will set you back a lot less than a brand new bumper (and maybe a grill or even a fender).