This female ichneumon wasp is huge – the body is an inch long, the tail two or three inches:
(I’m now offering a print of this wasp at a special price.)
It’s almost four inches long. The long tail is used to drill eggs into trees – the eggs hatch into larva that parasitize other insects. This wasp is in the genus Megarhyssa, the giant ichneumons. This species parastizes other wasps that lay eggs deep in trees. I wish I’d been able to observe her drill in – maybe next year.