Rat - Although they are commonly regarded as vermin or pests, rats have impressive traits that signify them as worthy opponents, including sociability, resourcefulness, and ambition. Despite their timidness, rats are known to be stubborn and full of devious ways. Thus, they should be treated with caution.

Rattlesnake - Rattlesnakes are venomous snakes. They are predators that live in a wide array of habitats, hunting small animals such as birds and rodents. They lie in wait for their prey or hunt for it in holes. Rattlesnakes use their rattle to drive enemies away. If this is your Patronus, you will have a fierce fighter on your side that will not give up easily.

Raven - Striking and iconic, the raven easily delineates from others within its broader feathered family due to its appearance and wits. It may be common in number and sightings, but it packs an intellectual wallop that easily plays to the mistake of underestimating the raven.

Red Squirrel - As an endangered species, the red squirrel is rare to find outside of protected wildlife reserves. If this is your Patronus, then you should definitely feel pride at your unique and uncommonly found personality! Curious and peaceful in demeanor, red squirrels are used to maintaining a strong level of privacy so as not to get hurt. They may be quiet, but these rust-colored creatures are vicious and not to be crossed when protecting their property and defending their friends.

Rhinoceros - The rhinoceros is a large, thick-skinned mammal known for the horns on its face. Although it is mostly a passive creature, the rhino can become extremely aggressive when threatened, charging down its predators on its own or in a herd. The rhino makes a sturdy, formidable Patronus, spearing Dementors on the tip of its horn or holding its ground to defend the caster.
Robin - The robin is an iconic feature of the landscape. These birds are full of song and will sing all year long. Muggles have often been deceived by their cheerful song and their trademark red breast and written them off as a pretty bird. In fact, these warriors will put up one heck of a fight to protect their territory! Lucky for you, once you have cast a robin as your Patronus, the bird will fight for you like it does its nest.

Rottweiler - This is a calm yet confident dog that allows its environment to influence it. People with this Patronus are hard workers and protectors. With a Rottweiler Patronus, you will always be protected from Dementors.