Topography of Poronumbu is steep, and it is a small block of forest in the north of West Sumba (Jepson et.al. 1996)
One of four highest bird diversity in Sumba, and also has the highest taxon diversity (Jepson et.al. 1996).
BirdLife International (2019) Important Bird Areas factsheet: Poronumbu. Downloaded from http://www.birdlife.org on 14/12/2019.