Almindelig Vejhveps med Trochosa sp. Edderkop
Anoplius viaticus with Trochosa sp. Spider.
Spider Wasp with a Wolf Spider

The Spider Wasp looks for Wolf Spiders. After a short, fierce battle it overpowers its prey. It stings the spider with its stinger that is at the end of its abdomen and injects it with a liquid leading to the spider's immediate paralysis.
It then drags the much bigger spider to a place where the wasp digs a hole in the ground, puts the spider in the hole and lays an egg in it. The larvae comes out of the egg and feeds on the spider.