Bees - man killers
Little known fact, bees and wasps kill more people than shark attacks in the US, nostril stings are the most painful as compared to buttocks and leg stings and also, if you ever wondered about what sting from what insect was the most painful:
"...the bullet ant (Paraponera clavata) is the clear winner(for pain infliction). The immediate category 4 pain from a bullet ant lasts for 5 hours! It then takes 24 hours to subside, with residual pain reported up to two weeks later. No wonder it is considered the most painful sting not just among hymenopterans, but all other insects!
Such a powerful sting has earned the bullet ant a place among the Satere-Mawe, a tribe in the Brazilian Amazon rain forest. During their coming-of-age initiation, young members of the Satere-Mawe wear mittens lined with bullet ants. For 10 minutes initiates dance in the stinging mittens to prove their courage. They must do this not once, but 20 times before completing their ceremonial journey."
I saw this initiation on a nature documentary and it was brutal.
http://www.joshuastevens.net/visualization/visual-guide-to-painful-insect-stings/