Mae llygoden yr ŷd yn fach iawn - gall oedolyn bwyso cyn lleied â darn 2c! Mae'n ffafrio cynefinoedd gyda glaswellt tal, ond rydych chi'n fwy tebygol o weld ei nythod crwn, glaswelltog…

The eider is a large seaduck, famed for its soft, downy feathers that are not only used by the bird to line and insulate its nest, but also by humans to stuff our quilts and pillows. It nests…

Our smallest breeding seabird, the storm petrel is barely larger than a house martin! They mostly nest among rocks or in burrows on small offshore islands.

The red mason bee is a common, gingery bee that can be spotted nesting in the crumbling mortar of old walls. Encourage bees to nest in your garden by putting out a tin can full of short, hollow…

A true wildlife 'hotel', Honeysuckle is a climbing plant that caters for all kinds of wildlife: it provides nectar for insects, prey for bats, nest sites for birds and food for small…

The meadow pipit favours moorland and grassland. It is an unfortunate victim of cuckolding behaviour - their own young being pushed out of the nest, so they can look after the 'parasitic…

A diminutive but aggressive predator, the three-spined stickleback hunts tadpoles and small fish. It is also known for fiercely protecting its nest of eggs until they hatch. Look for it in ponds,…

A medium-sized diving duck, the goldeneye can mainly be spotted in winter when birds fly in from Northern Europe. Conservation efforts have helped small numbers of these birds to nest in Scotland…

The gadwall is a dabbling duck, feeding at the surface of shallow water by 'upending' - putting its head down and its bottom up! Only a small number of gadwall nest in the UK, but large…

Mae’r ystlum lleiaf cyffredin mor fach fel ei fod yn gallu ffitio mewn bocs matsys! Er gwaethaf ei faint, mae’n gallu bwyta 3,000 o bryfed bob nos yn rhwydd; chwiliwch amdano’n gwibio o amgylch yr…

The Arctic tern is famed for its aggression towards any that would disturb its nest - it will dive-bomb intruders with its sharp beak. Large, noisy colonies can be found on the Farne Islands and…