Not exactly a good witch but not a bad mosquito either. Elephant mosquitoes-Toxorhynchites rutilus don’t pursue blood meals but sip flower nectar such as that of this Boneset Thoroughwort-Eupatorium perfoliatum.
Although it looks to be in danger, the Leather Bug aka Scentless Plant Bug-Harmostes fraterculus is really in no jeopardy. The flash in this case really highlights the metallic nature of the mosquito’s exoskeleton. Nice feathery antennae as well.