What is the bird on rhinos back called?

There is no bird specifically called a "rhino bird" that commonly sits on rhinos' backs.

Here's why:

* Rhinos are large and imposing: They don't typically have many birds that perch on them.

* Birds are opportunistic: They will perch where they find safe, elevated spots.

* African birds: Some birds found in the same habitats as rhinos might occasionally perch on their backs, but there's no specific association or name for such a bird.

If you're thinking of a specific bird, please provide more information about it.