Figure 23.52: Some Diverse Birds (A) Sandhill cranes feed on plants, insects, small reptiles, and even small mammals. As in other crane species, their mating and courtship behavior includes an elaborate dance display. (B) Owls such as this northern saw-whet owl are nighttime predators that can locate prey using their sensitive auditory systems. (C) Perching, or passeriform, birds such as this scarlet tanager comprise the most species-rich group of birds.