Mae gwenoliaid duon yn treulio’r rhan fwyaf o’u bywydau yn hedfan – gan hyd yn oed gysgu, bwyta ac yfed wrth hedfan – gan lanio i nythu yn unig. Maen nhw’n hoffi nythu mewn hen adeiladau mewn…

The little grebe is a fantastic diver, but to help it swim underwater, its feet are placed towards the back of its body, making it rather clumsy on land. It only really comes ashore to breed.

A breeding bird of fast-flowing, upland rivers, the grey wagtail can also be seen in lowland areas, farmyards and even towns in winter.

The common octopus is a highly intelligent, active predator. It even has a secret weapon - special glands produce a venom that it uses to incapacitate its prey!

Selfheal is a low-growing, creeping plant that likes the short turf of grasslands, roadside verges or even lawns. Its clusters of violet flowers appear in summer.

The soft, downy look of Yorkshire-fog makes it an attractive plant, even if it is considered a weed of cultivated land! It is also attractive to the caterpillars of the Small Skipper butterfly as…

The male purple emperor is a stunning butterfly with a brilliant purple sheen. Look for it feeding around the treetops in woodlands, or on damp ground, animal droppings or even carrion in the…

The ringlet gets its name from the small rings on the undersides of its wings. These rings show variation in the different forms of this species, even elongating into a teardrop shape.

The speckled wood prefers the dappled sunlight of woodland rides and edges, hedgerows and even gardens. Despite declines, its range has spread over recent years.