two species of coral snake: Micrurus dumerili and Micrurus mipartitus. Several non-venomous snakes including boa constrictor, Ecuador sipo (Chironius grandisquamis), mussurana (Clelia clelia), blunthead tree snake (Imantodes cenchoa), banded cat-eyed snake (Leptodeira annulata), parrot snake (Leptophis ahaetulla), Boddaert's tropical racer (Mastigodryas boddaerti), brown vine snake (Oxybelis aeneus), Cope's vine snake (Oxybelis brevirostris), and centipede snake (Tantilla longifrontalis) also inhabit the island. Terrestrial mammals include the introduced white-headed capuchin, brown-throated sloth, Gorgona spiny rat and the agouti. As well, there are over a dozen species of bat found on the island. There are few species of terrestrial birds on the island, probably due to the large number of reptile predators. The most common include endemic subspecies of black-crowned antshrike (Thamnophilus atrinucha gorgonae), bananaquit (Coereba flaveola gorgonae) and red-legged honeycreeper (Cyanerpes cyaneus gigas). Aquatic The island is well known for the yearly passage of the humpback whale and their newborn pay its shores from August to October during their southward migration. Furthermore, one can find hammerhead shark, whitetip reef shark, sea turtle, whale shark and moray eel in the waters around Gorgona Island. The most common water birds found on or near the island are the blue-footed booby, brown pelican and magnificent frigatebird. The brown booby breeding population nesting in Gorgona Natural National Park is small, but is the most important breeding territory for Sula leucogaster etesiaca in the world. The population of 150 pairs registered in 2002 exceeds the number of individuals in other regional localities. Brown boobies in Gorgona National Natural Park breed asynchronously; on the same date Ospina-Alvarez recorded eggs, chicks in early or youthful stages, and fledged chicks. The calculated accumulative reproductive success (17.3%) included more than 95% of all pairs breeding in 2002–2003, but this may change from year to year. References External links University of Valle; Biological Monitoring for Contamination Pacific islands of Colombia National parks of Colombia Defunct prisons in Colombia Geography of Cauca Department Tourist attractions in Cauca Department Underwater diving sites in Colombia Chocó–Darién moist forests