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…

Look for the wood warbler singing from the canopy of oak woodlands in the north and west of the UK. Green above, it has a distinctive, bright yellow throat and eyestripe.

This bog-loving butterfly is mostly found in the north of the UK, where it takes to the wing in summer.

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.

Their long narrow shells are a common sight on our shores, especially after storms, but the animals themselves live buried in the sand.

The small, brown Dartford warbler is most easily spotted when warbling its scratchy song from the top of a gorse stem. It lives on lowland heathland in the south of England, where it nests on the…

Only a few pairs of snow bunting breed here, so look out for this striking black-and-white bird in winter around Scotland, the North West and the East coast of England.

The Atlantic salmon spends most of its life at sea, but makes an epic journey back to the river or stream in which it hatched to spawn. Look out for it in freshwater rivers in the north and west…

A large hawker, the Common Hawker can be seen throughout the summer and into autumn. A fast-flying insect, it catches its prey mid-air. Look for it around ponds in the uplands of the north and…

The huge white-tailed eagle is our largest bird of prey. Persecuted to extinction in the UK, it has been successfully reintroduced in Scotland. Look for it on the Isle of Mull and off the west…