Non-anthro

Non-anthro, full non-anthropomorphic, also known as non-morphic or feral, is a furry term used to describe a fictitious character or fursona that do not share almost any human characteristics traits associated with full furry/anthro beings. Less commonly, it is used to describe a regular, non-sapient animal.

Biology and sapience
Non-anthros will most commonly behave and look like the common feral animal they are associated with in nature (hexapeds, octopeds, pedes, pentapeds, Quadrupeds, winged, etc). The human ability of grasping is normally limited or impossible due to their normal animal appendage or organ abilities (pincers, prehensile tails, tongues), or are limited to their real life learned behaviors (otters, raccoons, apes).

The main trait that separates them from their real wild selfs is the ability for intelligent, human-like reasoning, normally via speech expressed with their vocal apparatus, or internalized thoughts.

In short, real life feral beings are in general sentient, i.e. aware, responsive/conscious of sense impressions and finely sensitive in perception or feeling, while most "non-anthros" are "sapient", i.e. having or possessing the ability to think and to reason.

Media
Examples of non-anthro characters in mainstream media can be found in movies like The Lion King, Lady and the Tramp, 101 Dalmatians, All Dogs Go to Heaven, Bambi, The Fox and the Hound, The Land Before Time series, and Balto.

In the furry fandom, some examples include Randy and Cindy from the webcomic Faux Pas, and the characters from TallyHO.