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.
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