The reserve is unusual in that it consists of two divergent habitat types: intertidal mudflats (fringed by saltmarsh and estuarine reeds), and 130 acres of deciduous woodland, mainly oak and coppiced sweet chestnut[?].
The estuary is important as a breeding, roosting and wintering site for many waterfowl and other birds, including woodpeckers, Nightingale, Blackcap[?], Whitethroat[?], Sedge Warbler[?], Reed Warbler[?], European Wigeon, Shelduck, Pintail, Teal, Dark-bellied Brent Goose, Grey Plover[?], Redshank[?], Curlew, Dunlin[?] and Black-tailed Godwit[?].
Mammals to be seen include Red Fox[?] Vulpes vulpes, Badger Meles meles, Grey Squirrel[?] Sciurus carolinensis, and Hazel Dormouse[?] Muscardinus avellanarius.
Butterflies and rare moths include White Admiral[?] Limenitis camilla, Chocolate-tip Moth[?] Clostera curtula and Peach Blossom Moth[?] Thyatira batis.
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