The red-billed oxpecker (Buphagus erythrorynchus) is a passerine bird in the oxpecker family, Buphagidae. It is native to the savannah of sub-Saharan Africa, from the Central African Republic east to South Sudan and south to northern and eastern South Africa. Its range overlaps that of the less widespread yellow-billed oxpecker.

The preferred habitat is open country, and the red-billed oxpecker eats insects. Both the English and scientific names arise from this species' habit of perching on large wild and domesticated mammals such as cattle and eating ticks. This species's relationship with rhinos gives the Swahili name Askari wa kifaru meaning "the rhino's guard".

Source: https://en.wikipedia.org/wiki/Red-billed_oxpecker