Figure 44.3: Many Animals Are Associated with Habitats of a Particular Structure (A) The legs and feet of the red-breasted nuthatch (Sitta canadensis) allow it to cling to the trunks, branches, and twigs of trees as it gleans small arthropods and seeds. It prefers conifer forests. (B) Pronghorn (Antilocapra americana), the fastest North American land mammal, uses speed to escape predators. It prefers open, flat habitats without obstacles to movement.