The first was a very rare 12ft (3.6m) Sowerby's beaked whale - normally a deep water species which feeds off squid and cuttlefish.

BBC: Dead rare dolphin and whale found

Dr Frantzis, who has just published his data in Nature, studies Cuvier's beaked whale a denizen of the Ionian sea off Greece's west coast, among other places.

ECONOMIST: Quiet, please. Whales navigating

Glass mosaic tiles will then be applied to create the images of an Atlantic white-sided dolphin, a short-beaked common dolphin and fin whale.

BBC: Sculptures selected for Dunnet Head and beach