Jolo (= Sulu) is the largest of the Sulu Islands. It has been reported to be almost entirely deforested, but recent observations from the air indicate that the numerous steep ridges on the island retain some forest cover. Some open forest certainly remains in Mt Dajo National Park, which includes the largest mountain on the island. The paucity of recent information on the birds and habitats of Jolo is a result of the political instability there, which has prevented any biological survey work.
Several of the threatened and restricted-range species of the Sulu archipelago Endemic Bird Area were recorded on Jolo in the past, but there is no recent information on their status there. The forests in Mt Dajo National Park, and possibly elsewhere on the island, are likely to support populations of some of these birds.
BirdLife International (2019) Important Bird Areas factsheet: Mount Dajo National Park. Downloaded from http://www.birdlife.org on 18/08/2019.