Isla Contoy Vogelschutzgebiet & Yucatán-Wildtiere
Isla Contoy (the uninhabited island national park 30 km north of Isla Mujeres — one of the most important seabird nesting colonies in the Mexican Caribbean, with over 150 bird species including large colonies of the magnificent frigatebird, the brown pelican, and the red-footed booby) and the rich marine life of the northern Yucatán coast (the whale sharks, the loggerhead sea turtles, the spotted eagle rays, and the vast schools of fish) make the waters north of Cancún one of the most important marine wildlife areas in the Americas.
- 1
Isla Contoy — Mexico's Smallest and Most Protected Island
Isla Contoy (Mexico's first protected area, 1961) is an 8.5km-long uninhabited island 24km north of Isla Mujeres — only 200 visitors per day are admitted via licensed operators; no development, no hotels, no permanent residents — just 150 bird species, mangrove lagoons, and Caribbean reef.
- 2
Frigatebird Colony — 10,000 Nesting Birds
Isla Contoy hosts the Caribbean's largest colony of magnificent frigatebirds (10,000+ individuals) — males inflate their crimson gular pouch to the size of a football during mating season (February–May); the birds soar on 2.3m wingspans overhead while visitors watch from a wooden observation tower.
- 3
Snorkeling the Ixlache Reef — Sea Turtles & Nurse Sharks
The Ixlache Reef surrounding Isla Contoy has among the highest coral cover of any reef in the Mexican Caribbean — green and hawksbill sea turtles graze on seagrass beds in the lagoon; nurse sharks rest motionless on sandy patches at 3–5m depth; the water visibility regularly exceeds 30m.
- 4
Whale Shark Season — June to September
Between June and September, the waters north of Isla Contoy and Isla Mujeres host the world's largest annual aggregation of whale sharks (up to 500 individuals confirmed in a single day) feeding on tuna and snapper spawn — licensed operators offer in-water swimming alongside the 10m+ fish (2 swimmers + 1 guide per shark, 30-minute rotation).
- 5
Pelican & Booby Nesting Grounds
Isla Contoy's eastern beach hosts nesting brown boobies (2,000+ pairs), brown pelicans, and reddish egrets — the birds nest on the ground within metres of the visitor path; rangers enforce a strict no-approach zone but the density of birds makes close observation inevitable from the designated viewing areas.
- 6
CONANP Research Station — Marine Biology on the Island
Isla Contoy's small research station (staffed year-round by CONANP rangers) monitors sea turtle nesting, coral bleaching events, and seabird populations — visitors can speak with the rangers about ongoing research; the station's turtle tagging database dates back to 1982 and has documented over 8,000 individual females.