The Large-tailed Nightjar Caprimulgus Macrurus is the commonest nightjar in Borneo.  You will be able to hear its tok tok calls in various kinds of habitat from grassland, secondary forest to cultivated areas and even in urban areas.  Add off-shore habitat as well as I found this particular individual on a small island off Kota Kinabalu.  Always nice to see a nocturnal bird in the day!