Rats
Typical Damage/Nuisance Caused:
Making nests in any part of a home, barn, and any other man-made structure.
Eating and spoiling stores of human food.
They carrier an array of diseases, spread through saliva, urine, and feces that are harmful to humans.
They have also been known to chew on electrical wires.

Quick Facts:
Rats are one of the most adaptable creatures in the world.
They are excellent swimmers, jumpers, climbers, and are also very cautious and intelligent.
Unless found in large numbers and food is scarce, they can be very difficult to trap.
Picture provided by E. J. Taylor, ASM Slide Laboratory; the picture is not rotated, the rat is actually climbing vertically