Circus macrosceles is confined to the Comoro Islands and Madagascar. It has not been seen recently on Mayotte (to France)4. The population in Madagascar has been estimated at 100-200 mature individuals, based on island-wide surveys by Rene de Roland, who has estimated <100 individuals12, but may not have covered all areas of suitable habitat throughout the species's range. 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 individuals12. However, owing to the uncertainty surrounding these estimates, the total population is assumed to be somewhere in the range 250-999 mature individuals. The Bealanana and Ankozobe regions in Madagascar are particularly important for the species9. It is suspected to be declining, but population trends have not yet been accurately quantified.
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