The archipelago, comprising 24 volcanic-coralline islands, has a total area of about 590 km2 (230 sq mi).[1] The largest of
these is Calayan with an area of 196 km2 (76 sq mi), while the highest peak in the island group is Mount Pangasun (1,108 metres, 3,635 ft) on Babuyan Claro.[3]
Islands
The following are the islands of Babuyan and their adjoining islets and rocks,[4] along with land areas and highest elevation:
Another small volcanic island located just 22 km (14 mi) NE of Camiguin Island, Didicas Volcano on Didicas Island, became a permanent island only after emerging and rising to over 200 metres (656 ft) above sea level in 1952.[7][8]
Flora and fauna
All of the islands within the island group are classified by Haribon Foundation and BirdLife International as key biodiversity areas, or sites with outstanding universal value due to its geographic and biologic importance. All of the islands within the island group have never been part of any large landmass, and thus have unique flora and fauna, most of which are found nowhere else. Research conducted by the Department of Environment and Natural Resources has found at least five faunal regions in the area, one of the highest densities of separate faunal regions in the world.
The island group is also a congregation site for endangered humpback whales, one of few in Southeast Asia. Due to its value to the natural world and Philippine biological diversity, various scientific and conservation groups have been lobbying for its declaration as a national park and its inclusion in the UNESCOWorld Heritage List. Humpback whales have re-colonized the area and the Babuyans have become the only wintering ground for the species in the Philippines[10][11] although historical records from the Babuyan Islands have not been confirmed.[12]
The whole archipelago is administered under the province of Cagayan with Babuyan, Calayan, Camiguin, and Dalupiri comprising the municipality of Calayan[13] while Fuga is under the jurisdiction of Aparri.[14]
Babuyan and Dalupiri are themselves individual barangays in Calayan municipality, respectively named Babuyan Claro and Dalupiri, while Fuga Island is also an individual barangay, also named Fuga Island, in Aparri.