 A hybrid of the common brown lemur ("Eulemur fulvus") originally from Madagascar, was introduced by humans prior to European colonization and is found on Mayotte.The mongoose lemur ("Eulemur mongoz"), also introduced from Madagascar by humans, can be found on the islands of Mohéli and Anjouan.22 species of bird are unique to the archipelago and 17 of these are restricted to the Union of the Comoros.