"The Caspian tern, the largest of its kind, has a heavy coral-coloured bill that makes it easily identifiable and a fitting inclusion in the 2017 colour coin range. The R10 coin portrays the bird flapping its wings on the reverse. Also depicted on the coin are its scientific name ‘Hydroprogne caspia’, the denomination ‘R10’, and the metal value ‘1 oz Ag 925 Cu 75’." SA Mint