Mae’n cael ei hystyried fel arwydd cynnar o’r gwanwyn ac mae cân y gog, neu’r gwcw, yn swnio fel ei henw: ‘cwc-w’. Mae i’w chlywed mewn coetiroedd a glaswelltiroedd. Mae’r gog yn enwog am ddodwy…

If you’ve ever been rockpooling, you’ve probably seen a limpet or two! Their cone-shaped shells clamp onto rocks until the tide comes in, at which point they become active. Limpets move around…

You're more likely to see the attractive, brightly coloured caterpillars than the mullein moth itself.

Barnacles are so common on our rocky shores that you've probably never really noticed them. They're the little grey bumps covering the rocks that hurt your feet when you're…