In Nicaragua, the Miskito Cay (Cayo Miskito), also known as Cayo Mayor, is the largest and most important cay located in the center of the archipelago measuring 37km2. Other main islands are Maras Cay, Nasa Cay, and Morrison Denis Cay. The Miskito Cays Biological Reserve is one of 78 protected areas of Nicaragua, it was declared a protected area in 1991. The cays, along with a stretch of the adjacent mainland coast, have been designated an Important Bird Area (IBA) by BirdLife International.[8]