The beaver is a furry mammal that inhabits Camp Wawanakwa. It primarily appears in Total Drama Island, but has also made minor appearances in Total Drama: Revenge of the Island, Total Drama All-Stars, and Total Drama: Pahkitew Island.
In The Big Sleep, several beavers are seen building a dam and building a sleeping Owen into it by a river. Later in the episode, Chris reads a book to the five remaining campers who are awake, about the history of Canada. When he open the book, a beaver pops out from it.
In Wawanakwa Gone Wild!, while Chris is doing the recap, a beaver bites him. Chris is about to curse at the beaver, but stops mid-sentence and instead asks the audience if they think he needs a rabies shot from the bite. During the challenge in this episode, Geoff is assigned to catch a beaver, which he proceeds to do. He enters a beaver home and tries to persuade them to follow him, but they slap him with their tails. An angered Geoff tells them to stop, but they continue to beat him anyway. Eventually, he brings the dam to the cage and shakes the beavers into it to end the challenge. The beavers later attack Owen when he is locked in the cage with them and the other animals.
In The Very Last Episode, Really!, an alarmed beaver is seen when Owen is sliding down the fireman's pole, making a loud screeching noise that rang throughout the whole island. In Total Drama, Drama, Drama, Drama Island, Harold mentions beavers to Noah repeatedly throughout the start of the episode, mentioning that he has diaries and sketches about beavers and how they differ to rats. He tells Noah that he can borrow his collection of beaver diaries to learn more about beavers, to which Noah turns down the offer. Later in the episode, Heather crashes through the roof of a beaver dam after a hang-gliding incident, and yells at the beavers, who proceed to repeatedly smack her head with their tails.
In Moon Madness, a beaver under the effect of the Blue Harvest Moon attacks Scott. Courtney later uses a beaver to cut the rope of the bridge, and after she tosses it off the cliff, it gives her the middle finger.
In I Love You, I Love You Knots one of the "scares" that Sky had to do, was putting braces on a beaver. After a fight with it, she managed to do it and earned a point for her team.
A close relative of the beavers are woolly beavers, who are covered in thick woolly fur and have mammoth like tusks. They are native to Boney Island, but can occasionally be found on Camp Wawanakwa and the Abandoned film lot. They are carnivorous and will eat humans, which causes them to be highly feared by others.
The woolly beavers first appear in Up the Creek. After the Screaming Gophers arrive at Boney Island, the beavers began chasing them while they attempted to carry their canoes through the woods. The beavers eventually stopped chasing the Gophers after they got to a swamp-like area.
The beavers appear in One Million Bucks, B.C. due to the theme of the prehistoric challenge. Harold, while looking for firewood for the challenge, stumbled upon their dam from the set of the movie Rodents That Kill parts one and two. However, when Duncan asks if they are animatronic, Chris says yes, but winks to the camera to show he was either lying or playing the viewers. They chase after Harold until Leshawna attacks them, then reappear during the final challenge of the episode, gnawing away at the pillar, which causes Harold and Justin to both fall into the tar pit, giving both teams a point. Contrary to what Duncan believes, the woolly beavers can, in fact, swim through tar, eat things besides wood, and climb.
In Runaway Model, woolly beavers are seen when the contestants visit Boney Island eating the bones of the workers sent in to build a resort by Chris, wearing their hardhats, even one of them drinking their coffee. At the end of the episode Lindsay is seen asking them who ate the construction workers for directions back to Camp Wawanakwa, who in turn begin growling hungrily at her.
- The beaver is one of the five characters to hold up the middle finger, with the others being Duncan, Leshawna, Lindsay, and Sasquatchanakwa.