Mae'r gwyn bach yn ymwelydd gardd cyffredin. Mae'n llai na'r gwyn mawr tebyg, ac mae ganddo lai o ddu ar flaen ei adenydd.

Found in ponds and marshes, the fragile look of the Common water-measurer belies its fierce nature. A predator of small insects, it uses the vibrations of the water's surface to locate its…

This large, fluffy-looking moth is on the wing in July and August, but you might spot a caterpillar at almost any time of year.

Wedi’i gyflwyno o Japan yn y 19eg ganrif, mae canclwm Japan yn blanhigyn estron ymledol bellach ar lawer o lannau afonydd, tiroedd diffaith ac ymylon ffyrdd, lle mae’n atal rhywogaethau brodorol…

The defensive mechanism of the pill woodlouse is very recognisable - it curls itself into a tight ball, only showing its plated armour to its attacker. It is an important recycler of nutrients,…

Escaped or intentionally freed from fur farms in the 1960s, the American mink is now well established in the UK. Its carnivorous nature is a threat to our native water vole and seabird populations…

The eel is famous for both its slippery nature and its mammoth migration from its freshwater home to the Sargasso Sea where it breeds. It has suffered dramatic declines and is a protected species…

This day-flying moth is found on flowery meadows, often in the company of other moths and butterflies.