The knopper gall wasp produces knobbly red, turning to brown, growths, or 'galls', on the acorns of Pedunculate Oak. Inside the gall, the larvae of the wasp feed on the host tissues, but…

The red-eyed damselfly is a small, but robust, damselfly of canals, ponds, lakes and slow-flowing rivers. As its name suggests, it has bright blood-red eyes, but a mostly black body.

A familiar garden bird, the blue tit can be seen around bird tables and feeders, as well as in woodlands and parks. Listen out for its trilling, 'tsee-tsee-tsee' song. It is smaller than…

A key species in the story of conservation, the avocet represents an amazing recovery of a bird once extinct in the UK. This pied bird, with its distinctive upturned bill, can now be seen on…

The Alcathoe bat was 'discovered' in the UK in 2010 when it was confirmed as a separate species to the very similar whiskered and Brandt's bats. Little is known about its range and…

The red admiral is an unmistakable garden visitor. This black-and-red beauty may be seen feeding on flowers on warm days all year-round. Adults are mostly migrants, but some do hibernate here.

The stone loach is notoriously hard to spot - not only is it mostly nocturnal, it is also well camouflaged and can partially bury itself in the riverbed. It uses its whisker-like barbels to find…

Ever wondered what that little black dot whirling in circles on the top of the water of a pond is? Those are whirligig beetles! Often seen shooting across the water surface on the hunt for its…

A familiar garden bird, the great tit can be seen around bird tables and feeders, as well as in woodlands and parks. Listen out for its shrill song that sounds just like a bicycle pump being used…

A rare breeder in the UK, this sooty-coloured bird is as at home on an industrial site as it is on a rocky cliff face.

This wading bird is a rare visitor from North America, usually spotted in autumn.