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Trimley Marshes

Whether it is rafts of duck, colonies of avocet or the razor-like wings of a peregrine in stooping flight, the sheer number of birds that Trimley Marshes attracts is nothing short of spectacular.

Wigeon, teal, Brent geese and redshank are among some of the species you can expect to see with the unmistakable sight of the marsh harrier ghosting over reedbeds almost guaranteed – the clamour of wading birds taking flight often a first clue to their haunting presence.

The reserve’s richness is perhaps even more remarkable given that the site started out as a blank canvas in 1990. Intended to mitigate the loss of the internationally important Fagbury Mudflats with the expansion of the Port of Felixstowe, a mix of wetland features were sculpted out of the former farmland in what became a major civil engineering project.

The maturing reedbeds are now routinely visited by bittern in winter, joining water rail and reed bunting and impressive numbers of warblers in summer while the tern rafts on the reservoir are used by cormorants and black-headed gulls.

The reservoir is the hub of the reserve, acting not only as a refuge for wildfowl and marginal nesting birds, but also as the storage and distribution point for the reserve’s water. The lagoon and its islands provide a variety of habitats throughout the year, providing ideal nesting sites for avocet, ringed plover and tufted duck, while in spring and autumn the muddy margins make excellent feeding grounds for migrating waders such as common sandpiper, curlew sandpiper and greenshank.

The combination of fantastic habitat and Trimley's coastal location also means it is not unusual to see rarer migrants drop into the reserve, with lack-winged stilt, pectoral sandpiper and stilt sandpiper all recorded here.

Trimley Marshes was never meant to replace what was lost but the international designations that have now been placed on the reserve are a measure of the success in creating a fantastic place for birds and visitors. The skeletal outlines of Felixstowe’s cranes may cast a shadow over the skyline but fail to compete with breathtaking views of the Orwell estuary and the wildlife spectacle that breathes life into this wet landscape.

The reserve and its string of hides overlooking the reservoir, is a half an hour walk from the free car park along a gravel track fringed with trees and hedges. But those making the journey will be handsomely rewarded.

Trimley Marshes trail map - click to view


Species and habitats

Redshank, Avocet, Oystercatcher, Little Grebe, Emperor dragonfly, Gadwall

Nearby nature reserves

Levington Lagoon
2 miles - Suffolk Wildlife Trust
Copperas Wood Nature Reserve
4 miles - Essex Wildlife Trust
Newbourne Springs
5 miles - Suffolk Wildlife Trust

Nature reserve map

Reserve information

Cordy's Lane, Trimley St. Mary
IP11 0UD
Map reference
TM 262 355
Great for...
Best time to visit
Jan - Dec
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Opening Times
Reserve is open at all times, visitor centre is open most Wednesdays and at weekends.

There is a picnic area to bring your own picnic.

Visitor centre
84.90 hectares
Natura 2000
Site of Special Scientific Interest (SSSI)

Limited Access Linear public bridleway track to and from reserve hides and public footpath on river wall. Stone surfaced bridleway with some significant damp sections after rain, or in winter months. Hide adjacent to visitor centre has wheelchair accessible ramp. Car park 3km from hides, or 2km from reserve entrance. Please contact Site Manager for more information.
Walking information
Long (2 mile) walk from car park to hides and centre, can be muddy
Park at end of Cordy's Lane 2km from reserve entrance.
Dogs must be on lead
Grazing animals
Reserve manager
Suffolk Wildlife Trust
Tel: 01473 890089