Plain Chachalaca (Ortalis vetula) - Provides a photo, sound recording, taxonomy chart, and identification tips. Gray-headed Chachalaca (Ortalis cinereiceps) - Photo of this species in Costa Rica. Chaco Chachalaca (Ortalis canicollis) - Photos and brief description of this species. Little Chachalaca (Ortalis motmot) - Offers photos and facts about this bird's range and habitat. Plain Chachalaca: Ortalis vetula - Description, sounds and video. Curassows and Guans (Cracidae) - Detailed description of the family with images. Cracid Specialist Group - Information about chachalacas, guans, and curassows and their conservation.