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…

Did you know that there are coral reefs in the UK? UK seas are home to some amazing cold-water corals that form reefs on the seabed over 400m deep.

Look out for this tiny crab under rocks and boulders on rocky shores - you'll have to look closely though, they're pretty well camouflaged!

Have you ever stopped to look at the shape of a spider web? Garden spiders spin a spiral shaped web, perfect for catching lots of juicy prey!

The Leisler's bat flies fast and high near the treetops, but you might also spot it flying around lamp posts, looking for insects attracted to the light.

The kingfisher blue stripes of a blue-rayed limpet are a magical sight whilst rockpooling - you'll need to go on a very low tide though as their favourite home is on kelp.

Small-spotted catsharks used to be called lesser-spotted dogfish - which might be what you know them best as. It's the same shark, just a different name!

The common prawn is a familiar sight to anyone who has spent time exploring rockpools - particularly their characteristic quick dart into the darkness just as you spot them!