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Range DescriptionAccipiter butleri is endemic to the Nicobar Islands in the Bay of Bengal, India, where it is only known with certainty from Great Nicobar, Little Nicobar, Pilo Milo, Kamorta, Teressa, Bompoka, Tillanchong, Katchall and Nancowry islands (Sankaran 1995, BirdLife International 2001, A. P. Zaibin in litt. 2012). As many islands in the archipelago are poorly studied, it is possible that it is more widely distributed. It is evidently very scarce: during three years of surveys, R. Sankaran sighted 20-25 individuals of this species in its entire known range, and no sightings of this species were obtained in the coastal habitats of the Nicobar Islands during fieldwork in 2006 (K. Sivakumar in litt. 2012), whilst fieldwork from March 2009 to August 2011 produced only two sightings of single birds on Nancowry Island (A. P. Zaibin in litt. 2012). The impact of the 2004 tsunami on this species has not been studied (K. Sivakumar in litt. 2012).