 397 bird species have been documented within the park's borders.Many of those are migratory species on their way to and from Central and South America.A few species to be found there are black-bellied whistling-duck,
fulvous whistling-duck, mottled duck, blue-winged teal, green-winged teal, cinnamon teal, least grebe, anhinga, tricolored heron, white ibis, lesser yellowlegs, long-billed dowitcher, and least tern.