colourbeast

Out of all of the listed above, the Bot Fly is the worse.
Absolutely frightening to know that it lays larvae on humans.
Reminds me of the movie "Alien".
The rest won't attack you unless you disturb them.
Very disgusting with the brain photo urgh....!
Thank you for posting this information.

Bot Fly in human (What to do?):

The human botfly occasionally uses humans as the host to its larvae. The larva, because of its spines, can pose an extremely painful sub-epidermal condition. Removal processes include placing raw meat on to the area, which in theory will coax the larva out. Another option is to use the tree sap of the matatorsalo, found in Costa Rica, which is reputed to kill the larva, yet leave its body in the skin. Additionally, one can attempt to seal the breathing hole of the larva with nail polish or vaseline and then, after a day, squeeze out the suffocated, dead larva. Use of adhesive tape can work, but carries additional risk of infection because portions of the larva's breathing tube can be broken off by the tape and make the remainder of the body difficult to remove.