Holbox ("black hole" in Yucatec Maya) is an island in the Mexican state of Quintana Roo, located on the north coast of the Yucatán Peninsula. It is approximately 41.84 kilometres (26.00 miles) long and 1.5 kilometres (0.9 miles) wide, and it is separated from the mainland by a shallow lagoon that is home to flamingos, pelicans and other rich birdlife. Holbox Island is part of the Municipality of Lázaro Cárdenas and also part of the Yum-Balam Biosphere Reserve.