The nominate subspecies is thought to number in the thousands of pairs on the Khuriya Muriya Islands off Oman and Socotra, Yemen, while P. p. temptator has been estimated to number fewer than 500 pairs on Moheli Island in the Comoros (reviewed by Brooke 2004). It is thought likely that more breeding colonies lie undiscovered elsewhere in the northern Indian Ocean (Onley and Scofield 2007), thus the total population probably includes more than 10,000 mature individuals. The population trend is believed to be downwards.[1]