The ARK: Survival Evolved team has released the latest update to the game that includes the new giant Beaver that can, as would be expected, build dams, harvest and carry wood, act as a mobile crafting station and swim. In addition, players can get hold of handcuffs to keep enemies and prisoners don't escape.
As is typical for beavers, they build dams as habitats, but the larger creatures on the island have a tendency to trample them. As a result, finding unsullied dams in the wild is quite rare. The creature naturally gathers wood extremely efficiently, far more than most species on the island. It's not the strongest creature, so it can only carry limited amounts, however with its fantastic chisel-shaped teeth, survivors find it quite the handy mount to use for crafting on the go!
You can read the full update notes on the ARK: Survival Evolved site.