"Yep, I know what they are - red and black wood ants. Come this way." -- A Customer
Well, I chuckled at that. In the Northeast, the common species of carpenter ant is Camponous pennsylvanicus. It is completely black. However, there are some variations in color and size among different species of carpenter ants.
Wasps are beneficial insects. They lay their eggs on fly pupa and kill them by doing so. We would do well to leave them alone. Well... that's a true statement - kind of. Wasps are generally harmless, although yellowjackets, umbrella wasps and the infamous hornet can become a health and safety hazard for humans.
Rodents - including rats, mice, squirrels, voles and others - chew holes in structures in order to make their nests indoors. They carry leaf litter, etc into the house and chew up personal property. They leave behind droppings and urine (which is invisible) in your home.
White faced hornets ariticle at Wikipedia.
Directory of rodant related information.