This is a Botfly Being removed From a 13 ounce three week old kitten. He is doing quiet good and is with a foster. You can see the hole on the kitten’s face where it was actually living. The hole stays open so the Botfly can breathe.
Once mature it crawls out of the hole and then becomes a fly. The adult one lays eggs near the opening of a rodent burrow and the the entrance burrow then into the host’s skin. For this reason,
we often see these on the face and neck of cats because they pick up the Botflies when they are hunting rodents. If you see a big hole that won’t seem to heal, particularly on the face or neck, of an outdoor cat it may be a Botfly.