“There are no giraffes laying down,” he said.

At night, oxpeckers' fondness for buffalo waned, with justtwo nocturnal instances of oxpeckers riding on buffalo.

At night, oxpeckers’ fondness for buffalo waned, with justtwo nocturnal instances of oxpeckers riding on buffalo.(Snapshot Serengeti and the Serengeti Lion Project)

“It’s simply too difficult, dangerous, and time-consuming for them to really do that.” “You could argue that an oxpecker is making a better choice than a buffalo, which would undoubtedly be lying down a lot more,” he added.