The zone around Tulipe is in the top 3 of the 1,200 centres around the world of BirdLife International’s an annual count of species.
Further Reading:
Ridgely, Robert S. and Paul J. Greenfield. Aves del Ecuador. Quito: Fundación de Conservación Jocotoco, 2006. (ISBN: 9789978315033; 9789978315026) (in Spanish).