A Thunderbird is a very large bird that can create lightning.
As of now, only a single specimen of the species is known to exist, being The Great Raven. In both "Hilda and the Bird Parade" and "Chapter 3: The Bird Parade" , he does refer to himself as A thunderbird instead of the, implying there may be more. If there are, they haven't been shown yet.
- The Great Raven (only currently known specimen)
- This fictional species of bird is based off the mythological creature of the same name.