Noted for its populations of Eurasian bittern, European nightjar and other bird species, it covers a range of coastal habitats and is protected with SSSI, SPA conservation status.

The 4.43 square kilometres (1.71 sq mi) site covers a mix of coastal habitats, with areas of grassland, lowland heath, reed bed, shingle, dune and woodland.

Key conservation bird species found at the site include Eurasian bittern, European nightjar, nightingale and western marsh harrier.

[1] It is also an important over wintering site for wildfowl including large numbers of Eurasian wigeon, common teal and a flock of greater white-fronted geese.

[4] Many insect species can be found at North Warren, with large numbers of dragonfly and butterfly in summer months (northern hemisphere), including the nationally rare silver-studded blue.