Beaver
Typical Damage/Nuisance Caused:
Damming / clogging up culverts, rivers, creeks, etc. causing unwanted flooding normally near roads, bridges, homes, and man-made dams.

Quick Facts:
Beavers are rodents, and are the largest rodents in Michigan.
They are herbivores, eating aquatic and green plants. They eat the bark of trees, not really the wood in the middle.
Beavers build dams to flood areas and create an environment which keep them safe from land predators.
A couple of beavers removed from a place we call "Fraizer Land," after they continually dammed up and flooded the only access drive to the owners house

(Beaver picture at top is provided by NH Public TV)