The County Avifaunas are a growing series giving full details of the status and range of every species recorded in the county in question. Each title covers all species on the county list, with a detailed breakdown of rarity records, and each has introductory sections describing the county's general ecology, climate, weather patterns, its ornithological history and conservation record. Essex is of national and international importance to many migrating and wintering wildfowl and waders, which can be found on the estuaries. Further inland, the Lea Valley harbours important populations of several species within the complex of reservoirs and gravel-pits.

The result of 7 years intensive fieldwork by over 200 observers with chapters on habitat population trends & conservation. Colour plates graphs maps 300 pages. Essex Birdwatching Society

The 1200 acre Abberton Reservoir near Colchester (Essex) is one of Europe’s most renowned wetland sites. It is of international importance as a safe haven for wild duck, swans and other water birds.....

Abbotts Hall Farm is a 282 hectare nature reserve in Great Wigborough in Essex. It is the head office of the Essex Wildlife Trust, which manages the site. It is also part of the Blackwater Estuary National Nature Reserve....

Aubrey Buxton Nature Reserve is a 9.7 hectare nature reserve west of Elsenham in Essex. It was donated to the Essex Wildlife Trust by Aubrey Buxton and his wife in 1976.....

Blue House Farm is a 242.8 hectare nature reserve and farm in North Fambridge, on the north bank of the River Crouch between Burnham-on-Crouch and South Woodham Ferrers in Essex....

An extensive area of This grazing marsh owned and managed as a RSPB reserve located west of the A130 at South Benfleet Essex. The society has installed some 4 miles (6 km) of nature trails to explore on foot....

Little Terns, Ringed Plovers and Oystercatchers breed on the shellbanks and the saltings support a wide variety of species including Redshank, Yellow Wagtail, Meadow Pipit, Reed Bunting and Linnet.....

In the 1960’s, this 93 hectare site, was due to be commissioned as an oil refinery but due to various reasons it didn't go ahead. As a result the site was abandoned and nature took over creating a home for lots of different wildlife....

Set in a spectacular position overlooking the Colne Estuary, Fingringhoe Wick was Essex Wildlife Trust's first nature reserve created in 1961.The visitor centre with tower hide affords....

Hamford Water is described by Natural England as "of international importance for breeding little terns and wintering dark-bellied brent geese, wildfowl and waders...

Hanningfield Reservoir is a 402.9 hectare biological Site of Special Scientific Interest between Billericay and Chelmsford in Essex. It is owned by Essex and Suffolk Water and run by them in conjunction with the Essex Wildlife Trust..

Old Hall Marshes are part of the Blackwater Estuary RSPB reserve. The site is part of the Blackwater Flats and Marshes, and is also a Wetland of International Importance under the Ramsar convention....

West Canvey Marsh is the largest single area of green space on Canvey Island. This wonderful wetland reserve includes nearly two miles (3 km) of new nature trails, three viewing points, a picnic area and children's adventure area....

You can see all of the area’s wintering bird species roosting on the saltmarsh at Deep Fleet, or feeding in the vast mudflats of Copperas Bay. Breeding nightingale are a delight in spring...

Ray Island has a shingly foreshore/beach area on the northern side, with a sizeable freshwater pond nearby, and extensive areas of rough grassland. On higher grounds, there are Blackthorn thickets and some old Hawthorns....

In summer, scarce emerald damselflies buzz around the reserve and the diamond patterned coats of adders can be glimpsed slithering through the long grass.....

Wallasea Island is bounded to the north by the River Crouch, to the south east by the River Roach, and to the west by Paglesham Pool and the narrow Paglesham Creek. Much of the island is farmland, and wheat is the main crop....

The Nature Park is important for many species including Barn Owls, Short Eared Owls, Water Voles, Harvest Mouse, Skylark, Cuckoo and Shrill Carder Bee..

Wat Tyler Country Park consists of 125 acres of parkland set in the heart of the south Essex marshes and a SSI (Site of Special Scientific interest).The park lies 2 miles east of Basildon....