What animal eats caterpillars?

Birds, Hedgehogs, various Rodents and even come other Bugs like ants will be pleased to eat a cartapillar. I am told that when hungry a fox or a badger will resort to eating bugs, this would probably include sartarpillars.
The main enemy to caterpillars is birds. However, teams of ants ocassionally kill a caterpillar for food.