A wattled starling (Creatophora cinerea) perches on the back of a wildebeest. Lacking the distinctive black and yellow markings on its face, this starling may be a non-breeding male or a female.
Starlings are social creatures and often hang with livestock looking for a free meal. Livestock movement may stir up insects or reveal ectoparasites on their tough hide.
Either way, this bird is hungry and ready to help.
Mutualistic symbiosis at its best. Or put differently, we often work better in teams.