Cooperation between big and small men in the animal world is very common, and the rhinoceros bird and the rhinoceros are one of them

Rhinos often have parasites because of the folds on the surface of their skin, so rhinos are here to clean up these parasites, but because the mouth of the rhinoceros is too sharp, it can sometimes hurt the rhino
However, for rhinos, this small wound is not enough to hang teeth, and sometimes the rhino birds do not care when they have no intention of pecking at the rhinoceros
The relationship between the two guys is like a toothpick bird and a crocodile, relying on each other