I highly doubt anyone could see midge eggs in deer nostrils since the adult midge is almost too small for viewing with the naked eye.
I have seen documented reports of live midge eggs/larvae in fresh cattle manure (cowpies) near water puddles. The hatched aquatic larvae require water/excessive moisture for mobility.
NASAL BOTS are the larva layed in mouth/nasal passages of deer by adult female fly, Cephenemyia. They are not uncommon, are very visable (up to 1 in long) and rarely have any significant impact on deer health.
Dan
