In Costalegre, 270 species have been identified, of which 22 are endemic.

Additionally, in autumn and winter this strip of Jalisco is visited by a large number of migratory birds.

Some of the best known are the American Avocet, which generally lives in estuaries, lagoons and marshes, and the Tricolor Heron, which nests in bushes close to the ground and is recognized by its yellowish neck and bluish bill. Avoceta Americana, que vive generalmente en estuarios, lagunas y marismas y la Garza Tricolor, que anida en arbustos cerca del suelo y se reconoce por su cuello amarillento y pico azulado.

The Pajareras Islands are located in the Bay of Chamela and within the group of islands, Isla Cocinas with soft sand beaches is the habitat of the exotic booby bird and some other seabirds.