Manduca blackburni, commonly known as Blackburn's Sphinx Moth, Hawaiian Tomato Hornworm, and Hawaiian Tobacco Hornworm, is a species of moth in the family Sphingidae. It is endemic to Hawaii. Previously known from all of the main islands, this rare moth is now limited to Maui, the Big Island, and Kahoʻolawe. It is found in coastal mesic and dry forests at elevations from sea level 5,000 ft (1,500 m).M. blackburni is closely related to the tomato hornworm (M.