The species affected will include Dartford warblers, nightjar and dark-bellied brent geese.

Environment minister Michael Meacher, who made the announcement at an EU conference in Bath, said the new classifications mean nearly 750,000 hectares are now under special protection.

The habitats of birds like barn owls will be boosted

Large areas of nationally-important lowland heath, rare plants and animals and a range of other bird species will also be safeguarded.

East Devon Heaths is being classified as a Special Protection Area for Birds, and existing Special Protection Areas and Wetlands of International Importance at River Crouch marshes in Essex and Broadland in Norfolk are being extended.

Firms take conservation under their wing

Mr Meacher said: "These areas are vital if we are to ensure the diversity of habitat and species which makes this country a haven for wildlife."

He urged business to give nature a helping hand and make a profit at the same time, highlighting the way in which the leisure industry is involved in saving rare species.

Kite numbers have increased in Wales, with the birds becoming the focus of a small tourist industry, creating jobs and sparking wider public interest in conservation.

An eco-label for herring fishing in Essex estuaries is supported by Unilever and WWF.

The organisations back a scheme for a certified environmentally-friendly sustainable fishery and local fishermen believe this adds value to their product.