Deer nose botfly, Cephenemyia stimulator, Oestridae
As the name suggests, the larvae of this species are obligate parasites of cervids (deer). Larvae hatch in the adult female flyโs uterus; she then flies near the host animal and flings them into or near the animalโs nostrils. The larvae migrate down to the base of the hostโs throat where they attach, feed, and mature. Mature larvae are ejected out the nose or mouth and pupate in soil.
FYI - DO NOT google more images of this species unless you want to see very graphic, gory photos of the insides of dead deer noses with larvae attached.
Photo 1 by gillessanmartin, 2 by waldgeist, 3-4 by brothernorbert, 5-6 by adlerauge, 7-8 by jltasset, and 9-10 by daknuett