Roger Tory Peterson
10) Songbirds
Author
Description
Describes the physical characteristics, habitats, feeding habits, and voices of a variety of songbirds, arranged under the categories "Simple Songs," "Complex Songs," "Whistling Songs," "Warbling Songs," "Trilling Songs," "Name-sayers," and "Mimics."
11) Birds of prey
Author
Description
Describes the physical characteristics, behavior, voices, and habitats of a variety of eagles, hawks, falcons, and owls. Includes the Peterson System of identifying birds by their unique markings.