Today on a walk I noticed a number of honeycomb shaped nests like this one:
From Googling around it looks like they were probably Paper Wasp nests.
Two interesting factoids about Paper Wasps: (1) they are considered beneficial to gardens. Apparently, they feed on various insects, which actually make them a form of natural pest control (and pretty bad-ass).
(2) they have very well developed facial recognition capabilities. This may be useful for navigating their social hierarchy.
Next time I'm shooing away a wasp, I'll try to remember that they are more than just a summertime hassle.