Mae’r dyfrgi hyblyg yn nofiwr ardderchog a gellir ei weld yn hela mewn gwlybdiroedd ac afonydd ac ar hyd yr arfordir – rhowch gynnig ar arfordir gorllewinol yr Alban, Gorllewin Cymru, y West…

A scarce but distinctive brown seaweed with curved, funnel-shaped fronds. It is a warmer water species at the northern edge of its range on the south coast of England.

The sessile oak is so-called because its acorns are not held on stalks like those of the familiar English oak. It can be found in woodlands mainly in the north and west of the UK.

Once widespread, this attractive plant has declined as a result of modern agricultural practices and is now only found in four sites in South East England.

If you happen to be near rocky places such as sea cliffs, shingle coastlines or even gravel paths during the summer months you will most likely come across sea campion.

The thresher shark is a migratory species and passes through UK waters in the summer months. If you’re lucky, you might see this magnificent shark jump high out of the water in to the air.

The tiny firecrest vies with the goldcrest for the title of the UK's smallest bird. Once just a visitor, the firecrest can now be found breeding in woodlands in the south of England.