Couple of bugs which kind of overlap and such...
1: During the initial exploration of the Mite infested Cable Cave during the start of the game, I have noticed that the underground sounds suddenly play dispite not even entering the cave itself. Fully above ground yet, boom, sounds like I am underground...
2: The Mites seems to spawn within the walls of this cave as well as a few other cases. Actually discovered a Ladybird spawned within the Giant Rock next to the Tech Outpost near Baseball area. Throw in a couple other locations and such that seems to have the insects spawn within the ground, roots or rocks...