It is extinct in its largest habitat , LOCATION@1 , and has been called `` the rarest insect in the world '' , as the rediscovered population consisted of fewer than NUMBER@1 individuals living on the small islet of Ball 's Pyramid .

It no longer lives in its largest habitat ; Lord LOCATION@2 , and has been called `` the rarest insect in the world '' , because there are less than NUMBER@1 living today on the small islet of Ball 's Pyramid .
