Fruit flies are a yellow-brown fly with red eyes and black rings along the abdomen. The females are generally 2.5mm long and the males are slightly smaller. Notable for high egg counts and a fast reproduction cycle, a female lays around 400 eggs into rotting or decrying fruit or other material such as mushrooms. The eggs hatch within 12-15 hours with total development time averaging 8.5 days. Under crowded conditions the development time shortens significantly making an infestation quick to occur.