Bottle flies are common, large flies known for their metallic blue or green color. The name is applied to numerous species of blowfly in the genera Lucilia and Phaenicia. These flies are found in most areas of the world, and the most well-known species is the common greenbottle, Phaenicia sericata (or Lucilia sericata, depending on authority), though there are other common species such as Lucilia caesar, Lucilia cuprina, Lucilia coeruleiviridis, and Lucilia illustris. Bottles flies are typically found outdoors.