Flies Be Gone is an outdoor fly trap that is designed especially to reduce fly populations in areas like farms and resorts. Flies Be Gone traps flies outdoors using a safe, bio-degradable biomass bait (exclusive to Flies Be Gone). The trap is about the size of a football. The bait in each trap is effective for up to six weeks and can catch up to 20,000 flies, making it ideal for high-infestation areas such as feed lots, poultry farms, dairy farms, stables, kennels, outside homes, restaurants and Dumpsters. Since they use sterilized biomass as a bait, Flies Be Gone traps are 100% non-toxic and safe to use around humans and animals, the company says. They are completely self-sufficient, requiring no power source, and are disposable.