Life of the Tanager
Skutch, Alexander F.; Gardner, Dana
Illustrations by Gardner, Dana
A Guide to the Birds of Costa Rica [Stiles/Skutch]
Stiles, F. Gary; Skutch, Alexander F.
Illustrations by Sutton, George Miksch
Harmony and Conflict in the Living World
Skutch, Alexander F.
A Naturalist in Costa Rica
The Imperative Call: A Naturalist's Quest in Temperate and Tropical America
A Naturalist Amid Tropical Splendor
Helpers at Birds' Nests: A Worldwide Survey of Cooperative Breeding and Related Behavior
The Minds of Birds
Trogons, Laughing Falcons, and Other Neotropical Birds
Illustrations by Gillmor, Robert