Dragonflies rule! They eat wasps too which has been very noticeable at my house. My only question is we had an increased amount of mosquito's the last few years, now we have an increased number of their predator (dragonflies) this year, so what eats dragonflies?
EDIT: Check out some of these dragonfly facts on Wiki...
http://en.wikipedia.org/wiki/Dragon_fly#General_facts
The camoflage sounds really cool, I wonder how that works exactly?