They are only 0.08 to 0.24 inches long, and they resemble harmless house flies, but their bites are very uncomfortable – ...

Known to bite humans and feed off their blood ... each covered in short hairs. These tiny black flying bugs can be found inside homes or commercial buildings as well as outdoors.

No-see-ums can inflict painful bites ... but they can appear black at a glance. 3. Mosquitoes are typically gray or brown, but they can appear black at a glance. Drain flies are drawn to ...