I am not sure what you mean but animal which walk on their hind legs have straight legs and they are called bipedalanimals.
The term for a tree dwelling animal is 'arboreal'.
Deer is an animal. Dear, however, is a term of endeerment.
A beasty is another term for a beastie, a slang term for a beast or animal.
Arid
Deserts.
The term "slothful" comes from the animal sloth, known for its slow and lazy nature. Calling someone slothful implies that they are lazy or inactive, similar to the behavior of a sloth.
Deserts.
extremely cold
parasitic hurts the animal the term is mutual
The word bitch has more than a meaning. It means: 1. A female animal, especially a dog. 2. A lewd or immoral or a malicious woman 3. A complaint and/or something that is extremely difficult, objectionable, or unpleasant 4. A generalized term of abuse
Hunger
A biped is the term of a two leged animal such as us humans 2 legs