DistributionRead full entry
Range DescriptionCircus macrosceles is confined to the Comoro Islands and Madagascar. It has not been seen recently on Mayotte (to France) (Safford 2001). The species has a broad distribution stretching c.1,000 km from north to south on Madagascar, but occurs at very low densities; surveys in 2005-2006 of 71 % of the potential harrier habitat on the island recorded a total of 80 individuals (Ren de Roland et al. 2009). The population on Comoros (Grande Comore, Moheli and Anjouan: three separate subpopulations), where its habitat is nearly totally destroyed, is estimated at no more than 50 mature individuals (R. Thorstrom and L.-A. Ren de Roland in litt. 2007). The total population is estimated to be somewhere in the range 250-500 mature individuals. The Bealanana and Ankozobe regions in Madagascar are particularly important for the species (Ren de Roland et al. 2009). It is suspected to be declining, but population trends have not yet been accurately quantified.