Efallai bod bronwennod yn edrych yn hoffus ond maen nhw’n gallu bwyta llygod pengrwn, llygod ac adar mewn dim o dro! Maen nhw’n perthyn i ddyfrgwn a charlymod, sy’n amlwg o weld eu corff main, hir…

Caddisflies are a large order of insects that can be found in all kinds of wetlands. The larvae are known for making cases to pupate in, gathering stones, sand and leaves, and wrapping them with…

The common osier is a small willow tree that is found in fens and ditches, and on riverbanks. It has been widely cultivated and coppiced for its twigs, which are used in traditional basket-making…

The crab apple is familiar as a small tree that produces yellow-green, rounded fruit that is used for making jellies and wines. It can be found in woods and hedges, as well as in cultivated…

The scorpionfly, as its name suggests, has a curved 'tail' that looks like a sting. It is, in fact, the males' claspers for mating. It is yellow and black, with a long 'beak…

The large, dark grey water shrew lives mostly in wetland habitats. It's a good swimmer that hunts for aquatic insects and burrows into the banks.

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…

Spiny lobster, crawfish, crayfish, rock lobsters - many names, one animal! This pretty lobster was made extinct in many areas through overfishing, but is now making a slow comeback.