Piddocks are a boring bivalve. No, we don't mean dull... we mean that it bores into soft rock, creating a burrow. In fact, they're the opposite of dull - they glow in the dark!

A fierce predator of small fish and flying insects, the brown trout is widespread in our freshwater rivers. It is has a golden body, flanked with pale-ringed, dark spots.

This large burrowing bivalve, also known as the Icelandic cyprine, is found on sandy seabeds around much of the UK. It is the longest-lived animal known to man, with one individual found to be 507…

A dark, stocky warbler, the Cetti's warbler is most likely to be heard, rather than seen - listen out for its bubbling song among willow, marsh and nettles.

The birch polypore only grows on Birch trees. This leathery bracket fungus has a rounded, coffee-coloured cap that was once used for sharpening tools, hence its other name: the 'Razorstrop…

The dark green, straight and spiky stems of common club-rush or 'bulrush' are a familiar wetland sight. They are ideal for weaving and were traditionally used to make baskets, seats and…

Look for wood avens along hedgerows and in woodlands. Its yellow flowers appear in spring and provide nectar for insects; later, they turn to red, hooked seedheads that can easily stick to a…

The Monkey-puzzle tree is unmistakeable with its pyramidal shape, jutting branches and stiff, dark green 'spines' (its leaves). Widely planted in the UK's parks and gardens, it is…

The Banded demoiselle can be seen flitting around slow-moving rivers, ponds and lakes. The males are metallic blue, with a distinctive dark band across their wings, and the females are a shiny…

The Four-spotted chaser is easily recognised by the two dark spots on the leading edge of each wing - giving this species its name. It can be seen on heathlands and near ponds and lakes.

Common box grows in woodlands and scrub in southern England, with notable populations in the Chilterns, Cotswolds and North Downs. A familiar evergreen tree, it has shiny, dark green, oval leaves…

The lesser whitethroat is smaller than its cousin, the whitethroat, and sports dark cheek feathers that give it a 'mask'. Most likely to be heard around woodland and scrub, rather than…