House fly
Houseflies are a well-known pest of farm and home. Believed to have originated in central Asia, the insect expanded its range worldwide long ago as a commensal [...] buildings, they are considered a serious pest because: They can form flying swarms inside barns and hen houses, making them a particularly annoying deterrent [...] 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 oval-shaped, with