An easily overlooked orchid, the Common twayblade is yellow-green and less showy than other UK orchids. Look for it in woodlands and grasslands on chalky soils, in particular.

A plain-looking warbler, the garden warbler is a summer visitor to the UK. It is a shy bird and is most likely to be heard, rather than seen, in woodland and scrub habitats.

Our smallest breeding seabird, the storm petrel is barely larger than a house martin! They mostly nest among rocks or in burrows on small offshore islands.

The bearded tit is an unmistakable cinnamon-coloured bird of reedbeds in the south, east and north-west of England. Males actually sport a black 'moustache', rather than a beard!

The lesser spotted woodpecker is the smallest of the UK's woodpeckers. Listen out for its drumming, which is quieter than that of the great spotted woodpecker, in woodland, parks , orchards…

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.

When spotting the pintail in winter, look out for the fabulous, long tail feathers that characterise it. This dabbling duck feeds at the water's surface, rather than diving for food.