Hornets are mostly found in the Northern Hemisphere. The common European Hornet was accidentally introduced to North America around the mid 19th century. They live in the same latitudes as in Europe but never found in western North America. They are the strongest stinging insect, when they are mad enough sting through protective clothes. They also shoot their venom at humans’ faces!!
Wikipedia’s Webpage to learn more about Hornets
The scariest things about the Honey Bee is their recently unexplained disappearance! They are the most beneficial insects on the plant and their population problems are of great concern.
Wasps have taught most animals to fear their sting and most give them enough space. Those who happen upon the colony quickly find themselves swarmed! When one wasp is in distress it will emit a pheromone that other colony members will sense and go into attack mode. And they can sting repeatedly!!
http://animals.nationalgeographic.com/animals/bugs/wasp/
Yellow Jacket are not quick to sting unless to defend their colony. Once threatened their sting is quite painful as their stingers have small barbs and they are capable of stinging repeatedly! These stings also may induce severe allergic reactions for some individuals.
http://www.orkin.com/stinging-pests/yellow-jackets/
Killer Bee is also known as the African Honey Bee and are a hybrid of the Western Honey Bee, African Honey Bee, European Honey Bees and the Iberian Bee. First introduced in Brazil in the 1950s to increase honey production, but they escaped quarantine and since have spread to North America. They get the name Killer Bees from their hyper-defensive behavior as they are highly aggressive. They attack at a perceived threat relentlessly in great numbers!
Carpenter Bee got its name from the way it tunnels through the wood to make its nest. They are considered wood destroying insects, bearing into the wood of a house or structure.
Bumble Bee are not particularly an aggressive bee while out collecting nectar. But they will not hesitate to sting if they feel their colony is in danger.
The Bee Hunter Website to learn more about bees