Randy Sarafan writes:
A cockerfly is a member of the insect family that is best described as a cross between a cockroach and a butterfly. Its official species name is Noahivius Weinsteinicus. This name was derived by adding a whole bunch of Latin-sounding things to the name of its initial discoverer, Noah Weinstein.
Very few living specimens of the cockerfly are known to exist. As such, very little information is available about the insect. One thing that us scientists know for certain is that while the standard cockerfly can withstand large doses of nuclear radiation, they are extremely fragile creatures and are brittle to human touch.
Want to make your own? Randy made a guide for attaching butterfly wings to a cockroach to make a cockerfly.