Canvey Island the 30 hectares known as West Canvey marshes, acquired by the RSPB in 2007, and the Canvey Wick nature reserve. Canvey Wick is a designated Site of Special Scientific Interest (SSSI) at the site of the abandoned and incomplete oil refinery. The foundations of the 100 hectare (0.4 sq mile) site were prepared in the 1970s by laying thousands of tonnes of silt dredged from the Thames; the abandoned and undisturbed area has flourished as a haven for around 1,300 species of wildlife, many of which are endangered or were thought to be extinct; including the shrill carder bee, the
Oldfield Estuary Oldfield Estuary Oldfield Estuary is an estuary in the Goldfields-Esperance region of Western Australia. The estuary has a length of and is no wider than with a total area of approximately . The estuary has a main basin area of about and the rest is flood and tidal delta. The Oldfield River and the Munglinup River both discharge into the estuary. Uncleared bushland surrounds the estuary which has high dunes to the east and low sediments to the west. The lagoon is filled with river sediment to the north and beach sand to the south with a long high sandbar