A midge is a tiny, flying insect often found around damp or marshy areas. Synonyms for this pesky insect include gnats, no-see-ums, sand flies, punkies, and biting midges. Gnats are small, flying insects that are commonly found flying around food or in moist or damp areas. No-see-ums, as the name suggests, are so small that they are not easily visible to the naked eye. Sand flies tend to feed at dawn or dusk and can transmit diseases. Punkies or punk flies are biting insects that are often found in areas where livestock are kept. Whatever you call them, these insects are best avoided if possible!