Technically, this is not a good picture. But I publish it anyway because it convincingly shows how the Goldcrest got its name. The male can thus fold up his feathers on the top of his head to a "royal crown" which is black and yellow on the outside and bright amber on the inside. Since mating games and duels between males usually take place high up in the trees, few have seen a fully raised crown. For me, this was the first time - I have not even seen such a clear crown in a picture before... But Linnaeus must have known about it when he gave the little bird the name Regulus regulus - which can be interpreted a little freely from Latin as "Little King of Small Kings" ...