In Tanzania, we watched on many occasions when small flocks of red-billed birds descended upon the backs of giraffes, cape buffalo, elephants and hippopotamuses, prancing around like they owned them.

Symbiosis is the long-term relationship between two different species that can sometimes be beneficial to both parties. These ...

Andrew Taylor-Robinson does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations ...