If you've never heard of a botfly before, this, ahem, rather visual video will leave a pretty big impression. Botflies are parasitic organisms and some lay their eggs in mammals. Like human mammals.
One type of botfly latches onto mosquitoes mid-flight, attaching their eggs to the mosquitoes' stomachs. Then, when a mosquito lands on a human's skin, the eggs burrow into the tiny wound left by the mosquito bite.
Eventually, these eggs turn into larvae and will dig their way out from underneath the skin. While you can extract the larvae with tweezers, it's a rather painful process. since the larvae have tiny barbed spines that anchor them in place.
via The Scene
In other annoying pest news, bed bugs are becoming more and more of a problem. Scientists are continuing to study the cause, but some pesticides may simply be too weak at this point.