This exemplar is most likely a juvenile based on the yellow color of the head and neck which after a few years will turn progressively darker and develop a red throat which will be more pronounced in a male. In the guide I read that these birds need islands to roost as they cannot rest at the sea because their feathers get easily waterlogged. Island of Lankayan, Sabah.
The lesser frigatebird is a seabird of the frigatebird family Fregatidae. At around 75 cm in length, it is the smallest species of frigatebird. It occurs over tropical and subtropical waters across the Indian and Pacific Oceans as well as off the Atlantic coast of Brazil.