Other Rat-tailed Maggots have at least some standards, but they still live in stagnant, oxygen deprived environments like the pools of water in tree hollows or blocked gutters.
They do not annoy you at all, and hover in one place for seconds , before darting off to who knows where.
The species Eristalis tenax Linnaeus , commonly known as the drone fly adult or rat-tailed maggot immature , is a mimic of the European honey bee Apis mellifera Linnaeus Golding et al.
It is still unknown how long it takes for the eggs to hatch.
Drone flies belong to a larger group of flies technically called Syrphidae, with the common name flower flies or hover flies.
Onion and  maggots are particularly prevalent in the northern part of the U.