A Guide to the Birds of Costa Rica
Parrots of the Wild
Food Supply and the Annual the Anna Hummingbird, by F. Gary Stiles
Food Supply and the Annual Cycle of the Anna Hummingbird
Guía de aves de Costa Rica
On the Biology of Five Species of Swifts (Apodidae, Cypseloidinae) in Costa Rica
Annual Supply and the Annual Cycle of the Anna Hummingbird
Aves del Llano
Examining and Resolving Title Issues
Observaciones sobre la situación actual del picaflor rojo de Juan Fernández (Sephanoides fernandensis), con recomendaciones para un estudio integral de su ecología y biología poblacional