Cat owl

The cat owl lives primarily in the forests of both the Earth Kingdom and Fire Nation, though the creature is known to be sold as a pet in Ba Sing Se. Its natural prey are mice and other small rodents. Its distinctive meow-hoot is one of the most bizarre sounds in the animal kingdom.

Anatomy
The cat owl is a falconoid and has the head and tail of a cat, along with the wings and body of an owl. Its head, torso, and paws are covered in fur, which is slate gray on its dorsal sections and creamy white on its ventral sections. The feathers of its wings and tail are gray as well. Its eyes are commonly green.

Connection
The cat owl's body's coloration as well as facial appearance resembles that of a great horned owl. Coincidentally, the real-life great horned owl is sometimes nicknamed the "cat owl". This animal has a feline tail that is also furred. Coincidentally, the Chinese word for owl literally translates into "cat-headed eagle".

Trivia

 * Superstition has it that running across a cat owl is bad luck.