Meet the Hump-backed fly
Like other flies, hump-backed (Phorid) flies have the capacity to transport diseases. The adult females lay their eggs in or on decaying organic materials, such as animal feces or carcasses, sewage, rotting food and plants, and the layers of scum that build up on the sides of drains. Because they breed in corpses (from rats to…) they are also nick named “coffin flies”. Since they like decaying material as a source of food and reproduction, the risk of disease spreading is high. The presence of these flies usually means your sewer pipes and drains contain a lot of gunk. Phorid flies are weak fliers and are often seen walking rapidly across windows, TV screens, tables and walls. The life cycle for coffin flies is about one month, and a single female can lay as many as 650 eggs, once the maggots mature in a month they are ready to start reproducing in as few as two days. These flies are also parasitic, laying eggs in the nests of ants, bees, and wasps as well as on the bodies of live beetles, caterpillars, and millipedes. Tips on controlling these flies include: clean all sinks and drains, ripe fruits and vegetables should be kept in a bag or the fridge, and close the lids on all garbage and waste containers.
https://www.linkedin.com/pulse/meet-hump-backed-fly-randy-bilesky?published=t
http://www.delta-optimist.com/opinion/blogs/meet-the-hump-backed-fly-1.2327990
