PROTECTION STATUS: Eleven species of Hawaiian picture-wing flies are listed as endangered and one species as threatened
YEAR PLACED ON LIST: 2006
CRITICAL HABITAT: 8,788 acres in Hawaii’s Honolulu, Hawaii, Maui, and Kauai counties
RECOVERY PLAN: None
RANGE: Each species found only on a single Hawaiian island; listed picture-wings on the islands of Oahu, Molokai, Hawaii, Kauai, and Maui
THREATS: Degradation of habitat by feral animals and invasive plants, loss of host plants, predation by introduced yellow jackets and ants, cattle grazing, and fire
POPULATION TREND: Surveys from 1965 to 1999 showed declines of all the listed picture-wing species. The hammerhead picture-wing (D. heteroneura), for instance, formerly occurred at 16 sites on four of the island of Hawaii’s five volcanoes. It disappeared from every site and was feared extinct until rediscovered at a single site on the Hualalai volcano in 1993.