Among the many birds usually present then are: Wood Stork, White Ibis, Glossy Ibis, Black-necked Stilt, Anhinga, Black-bellied Whistling-Duck, Snail Kite, American Widgeon, Northern Shoveler, and Blue-winged Teal. One species that birdwatchers hope to see here is the Nicaraguan Grackle, since in Costa Rica it is found only in marshy areas just south of Lake Nicaragua