House fly
colour from yellow to red, to brown, to black as the pupa ages. New adult flies will emerge as early as two days after pupation (at temperatures above [...] larval instars until fully grown (7–12 mm), at which point they crawl to a cool, dry place near the breeding site to pupate. Flies in the pupal stage are o [...] and home. Believed to have originated in central Asia, the insect expanded its range worldwide long ago as a commensal organism to human populations; the