So considerably as is identified, North American pink-tailed hawks have preyed upon 9 species of amphibian, four of which are toads. One other more substantial species, the rough-legged buzzard, mostly nests considerably north of the breeding array of red-tailed hawks. In 1 instance, a purple-tailed hawk failed to kill a healthful drake crimson-breasted merganser (Mergus serrator), with this duck believed to weigh 1,100 g (2.