A fly landing in the ear of a tourist visiting Peru turns out to be more than just annoying. The screwworm fly had sufficient time to lay eggs that hatched flesh-eating maggots in her ear canal. Warning: the video may be disturbing to some viewers As strange as this sounds, it is not that uncommon Fortunately the screwworm fly has been effectively eradicated in the United States since the 1960's by releasing sterile male flies resulting in fewer and fewer offspring. This work was conducted by the USDA as you can imagine how this fly would decimate livestock.
I can't imagine a more unpleasant way to go. This poor oleander aphid (Aphis nerii) has its innards sucked out by a hoverfly larva. photo details: Canon MP-E 65mm 1-5x macro lens on a Canon 20D f/13, 1/250 sec, ISO 100 MT-24EX flash diffused through tracing paper levels adjusted in Photoshop.