|Common Green Bottle Fly|
The size of an adult bottle fly usually grows somewhat bigger from the larva stage yet the average range is still around 10-14 mm. In comparison, it is somewhat larger than a housefly. Common Green Bottle flies are known for their metallic green, blue or golden shine to its back. In further examination, three cross-grooves and 6-8 black bristle-like, or rough, hairs on it's thorax. The wings are clear with the addition of light brown veins. Both the legs and antennae are black. The head holds true to most flies with large eyes under the compound eye category. They also have sponge-like mouth parts such as a house fly would.
Proper identification of the Common Green Bottle Fly requires two characteristics. These two aspects of the bottle fly are important because the Common Green Bottle Fly is almost identical to its sister species, the Lucilia cuprina. In fact, microscopic examination is needed to tell the two species apart. The first main characteristic of the Common Green Bottle Fly is the presence of three bristles on the dorsal mesothorax. This body region is located on the middle of the back of the fly and can be most used when identifying the adult life stage of the fly. The Common Green Bottle Fly has 6–8 bristles on each side while Lucilia cuprina have only one. The second identifying characteristic is found when looking at the femoral joint in the first pair of legs. When looking at the Lucilia cuprina species, the femoral joint is metallic green. Rather, when investigating the Common Green Bottle Fly, this joint is a blue-black color.
|Pinched this image from the internet, but it shows three key id features for Lucilia sericata making it possible to id it from an image.|