Robert S. Ridgely

Drawn from The Birds of South America: The Oscine Passerines and The Birds of South America: The Suboscine Passerines—including full accounts of nearly 2,000 species and more than 400 new bird paintings, for a total of more than 1,500 species illustrations—this is the definitive field guide to South American songbirds.

A major reference work on South American birds.

A thorough resource on the oscine passerines of South America.