Chipmunks are definitely bitchy, but not necessarily rude. Seagulls also come and steal your shit at the beach. 

Hyenas for sure. They'd be sarcastic in a rude and cynical way, and they'd laugh at you, not with you.

Ferrets feel extremely rude. And raccoons. Raccoons are your dead beat roommate who raids the fridge but refuses to clean up after themselves. 

Idk why flamingoes rub me the wrong way, but that is my answer for sure. They're just so pink and give me extremely arrogant energy for some reason lol

Maybe not exactly an animal, but imagine what must be going through the head of a mosquito. They're literally just on the planet to mess with people!

Dogs would definitely be the nicest. Cats would be rude. 

Swans are rude af and terrifying to go near. 

If animals could talk, which species would be the rudest of them all?

Rude animals