Schroeder,
we agree...our PM house has sat without occupants for the past couple of years...dont know why the house is empty but I count on the 1000's of dragon flies we have to keep our mosquito population at a minimum.

Some interesting facts on the "mosquito hawk" some are capable of speeds of up to 55 miles per hour.
A dragonfly has a lifespan of twenty-four hours.
A dragonfly's penis is shovel-shaped at the end, to scoop a rival male's sperm out of the female it's impregnating. Thats wacky but since they only live 24 hours I guess they have to move fast and can't be picky.
I saw a nature show the other day that had a slow mo of a dragon fly nymph (they are underwater) inhaling a small fish.
I have read its impossible to catch a dragon fly...the big eyes and fast speeds.