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A rhino looking at an oxpecker, also known as a tick-bird, which eats the ticks on the rhino

$A beautiful large white rhinoceros with a stowaway Oxpecker. The Oxpecker bird is know for eating ticks and other external parasites, the oxpecker acts as a watchman for the mammals on which it happens to be situated. When danger approaches, a hissing call warns its host to a potential and nearby predatory threat thus allowing the host ample opportunity to either fight or flee.\nRhino horns are similar in structure to horses’ hooves, turtle beaks, and cockatoo bills. They are made of keratin – in rhinoceros horn, it is chemically complex and contains large quantities of sulphur-containing amino acids, particularly cysteine, as well as tyrosine, histidine, lysine, and arginine, and the salts calcium carbonate and calcium phosphate.$