House fly
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 30°C) or [...] Believed to have originated in central Asia, the insect expanded its range worldwide long ago as a commensal organism to human populations; the housefly [...] waste, carrion or feces, over the course of three to four days. Development time for all Musca domestica life stages is temperature-dependent, with maximum