The standard bloatfly is covered in a green and brown carapace. It prefers to attack at long range, using its own larva (each of which sports a wicked dart-like spine) launched from the abdomen. An individual fly’s supply of larvae is seemingly inexhaustible, and unless evaded or eliminated, the creature will pursue a target relentlessly. Bloatflies typically live in small groups of two to four individuals, but can be encountered on their own. Despite the increased size, they have no difficulty staying airborne. (Wiki).