Halftail

Halftail is a dark brown tabby tom with a short tail.

Into the Wild
In Into the Wild, Graypaw tells Firepaw that ever since a badger bit Halftail's tail off, he hasn't been able to climb a tree for fear of falling, and not having his tail to help him spin in midair.

Rising Storm

 * He, Bramblekit, and Patchpelt were left behind in the camp, and Yellowfang and Fireheart went back to find him. Fireheart had taken Patchpelt, who had died, and Bramblekit back to the clan, and later looked for Yellowfang and Halftail. He was dead, and Yellowfang had died as well.