There are non-anthropomorphic (normal non human-like) animals in the Happy Tree Friends world. Like the Happy Tree Friends, they can be killed in bloody, gruesome ways. In other cases, they are the cause of a character's death.
- 1 Mammals
- 2 Birds
- 3 Reptiles and Amphibians
- 4 Fish
- 5 Invertebrates
- 6 Notable Flora
- 7 See Also
- Main article: The Baboon
A baboon - though it more closely resembles a mandrill - appears in From A to Zoo. It is tormented by Cuddles and Toothy, and, as a result (though it may also have been from Sniffles' camera's flashing), goes rampant and kills Sniffles by tearing him apart, and eventually (possibly) causes the deaths of everyone still alive on the bus.
- Main article: The Cow
- Main article: The Grizzly Bear
A monkey can be seen swinging on vines at the beginning of Idol Curiosity. In the same episode, numerous dead monkeys fall from the sky when Sniffles picks up The Cursed Idol. A monkey can be seen locked in a cage in Junk in the Trunk, where it appears to be smoking a cigar.
- Main article: The Orca
The Orca appears in Snow Place to Go, in which it kills off many of the Happy Tree Friends still alive in the frozen wastelands.
Two pigs appear in Aw, Shucks! as fairground animals, but are killed along with every other animal and character there minus Lumpy.
Multi-colored rabbits can be seen on a shelf at the pet store in Doggone It.
- Main article: The Reindeer
A reindeer is featured in Reindeer Kringle, kicking Petunia multiple times in the face. The reindeer can also be seen from a distance in Milkin' It and Class Act. The reindeer makes another appearance in Just Be Claus as it is seen pulling Santa Lumpy's sleigh.
The Rhino makes an appearance in From A to Zoo, in which it is agitated by Cuddles burning its rump, and stabs Toothy through the face with its horn.
The Seal appears in Better Off Bread, in which it is suffering from an oil spill along with two gulls. Its body is set on fire after Splendid uses his heat vision to repair the leaking oil tanker nearby.
Two sea lions appear in Water You Wading For, where they bounce Cuddles back and forth to each other like a beach ball.
Some sheep can be seen as pets in Doggone It. They are also animals at a fair in Aw, Shucks!, where they end up getting killed by Lumpy's giant corn. A sheep can also be seen flying out of Lifty and Shifty's van and ends up living at Lumpy's house.
- Main article: The Whale
The Whale has appeared in 4 episodes. It first appears in Get Whale Soon as the whale that eats Lumpy and Russell. It then makes another appearance in Water You Wading For, in which it appears out of a pond and crushes Cuddles. Its third appearance is in A Change of Heart, in which it is seen dead, with an also dead Handy lying on it. Two whales appear in Mirror Mirror, Splendid uses a humpback whale to fight while Splendont uses a sperm whale. Because of the size of the former it blows Splendont's whale to pieces.
- Main article: List of Birds
Numerous birds have appeared in the series, some of which play pivotal roles in episodes.
Reptiles and Amphibians
- Main article: List of Snakes
Numerous snakes have appeared in the series, almost all of them being involved in the injury or death of a character.
An alligator first appears in Water You Wading For as one of the creatures that attack Cuddles. A pet alligator is later seen in Junk in the Trunk, being held hostage with many other animals by Lifty and Shifty. An alligator can also be seen in the jungle level of Run and Bun.
A Frog is killed by The Mole in Every Litter Bit Hurts by being impaled with a litter spike, before being collected in a plastic bag. Another frog appears in Junk in the Trunk as one of the pets stolen by Lifty and Shifty.
Dinosaurs and Pterosaurs
- Main article: List of Fish
Numerous fish have appeared in the series, some of which play pivotal roles in episodes.
Various Marine Life
These marine animals (consisting of a sawfish, a hammerhead shark, and an electric eel) are seen in Sea What I Found, in which Russell uses them to build a sea vessel to chase after Lifty & Shifty. However, this does not work and the sea creatures viciously attack him.
- Main article: List of Invertebrates
Flesh-Eating Flowers appear in Idol Curiosity.