TreeClan
Other Warriors of the forest said to be the highest jumpers and tree climbers. Every kitten grew up around an abundance of trees and lived and breathed through the forest crowded with them. TreeClan Warriors make excellent battle strategies this way, dropping in from above to surprise their enemies. This Clan was said to be EarthClan's greatest ally in their times of need.
CliffClan
CliffClan cats are some of the most intelligent in the forest. They hid within the safety of large caves with many entrances and exits so they were not trapped. They easily maneuver territory, especially if it has valleys or tunnels, and are cautious and organized when it comes to law and honor. For that reason, CliffClan Warriors are the easiest to reason with and trust.
BreezeClan
It was once said that BreezeClan cats ran with wolves and foxes. BreezeClan cats are notably sleek and fast on their feet. They are said to be blind warriors who attack without fear, even if they are injured or dying. Sometimes it can make them seem badly-tempered, but there is no Warrior a cat fears more than a fully-trained BreezeClan Warrior.
Other Clans
Only the stars remember these Clans. Sometimes they are told to kittens as stories, but no one is really sure whether or not they were ever real.
SkullClan: Enemy
For many moons, this Clan was a nightmare for EarthClan. Kits and herbs stolen, Warriors wounded, territory trespassed. These Warriors were said to be the cause of the Clan's moving places, because the leader, a large tom cat named Skull, who wore a giant fox skull on his face, lit their camp on fire. This Clan was said to have murdered Cougarstar on his last life, and then disappear, as if it had never existed. Some cats say that it is very much alive with the evil they had once seen, but that the Clan is so far away that StarClan does not know what happened.
NightClan: Enemy
This Clan nearly destroyed EarthClan. They were its first real enemy, led by Darkstar, a vicious cat granted nine lives by the Dark Forest. It was said that for each time Darkstar died, a ghost of him haunted EarthClan's kittens and apprentices. Cougarstar eventually beat him, but lost many lives throughout the long battle. NightClan disbanded into rogues and loners after they were defeated.
StormClan:
These cats prophesized the weather. It went beyond Medicine Cats; many were gifted with the ability to predict the weather moons in the future, including natural disasters. EarthClan cats envied their abilities and ignored their presence to evade their new jealous nature.
StoneClan:
This Clan did not exist for long. Their Warriors were mysterious and swift, and during a time of plentiful prey, they came to the edges of EarthClan territory to hunt. EarthClan Warriors could never get close to these cats, as they were too quick and somehow outran all of their fastest Warriors. StoneClan apprentices could even get away. Some say StoneClan cats once spoke from distances to the EarthClan cats to explain, but that's a mere rumor.