A chalk reef is a natural seabed made from chalk that rises above the surrounding seafloor.

Cool, crystal-clear waters flow over gravelly beds, streaming through white-flowered water-crowfoot and watercress in serene lowland landscapes.

Flower-rich grasslands, full of wildflowers such as orchids, snake's head fritillaries and bird's-foot trefoil support an abundance of insects, from bumblebees to butterflies.

This is a strange, sparse habitat of grassland growing on old mining tracks and slag heaps, on river gravels and naturally exposed metal-rich soils in the mountains. Only the toughest metal-loving…

Limited in distribution, this sweetly-scented, short-cropped, springy grassland is famed for its abundance of rare and scarce species.

Typical of softly rolling pastoral landscapes, the short, aromatic turf of lowland calcareous grassland is flower-rich and humming with insects in the summer. Its long use by humans lends it an…

Sprinkled with diminutive, short-living flowers in spring and parched dry by July, this is a habitat of heathlands, coastal grasslands and ancient parkland.

These grasslands, occupying much of the UK's heavily-grazed upland landscape, are of greater cultural than wildlife interest, but remain a habitat to some scarce and declining species.