El Yali has been considered an important nesting site for various species of birds in central Chile and a place of protection, rest and feeding for migratory species, which has made it the area with the highest concentration of avifauna in central Chile, with more than 115 species, including: the coscoroba swan, black-necked swan, Chilean flamingo, Franklin's gull and Cahuil gull, various types of ducks, the cuckoo heron and small birds, among others.