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Thelnetham Fen

Stand still, close your eyes and listen to the whispering of the fen

These small valley fens have survived the threat of nearby dredging of the Little Ouse River and are havens for water-loving plants. Both Old Fen and Middle Fen are dominated by a mix of saw sedge and black bog rush, with shows of grass-of-Parnassus in the calcium-rich spring flushes. Marsh lousewort grows here along with stonewort an interesting algae whose skeleton can be seen in pools amongst the sedge.

Old Fen is now mainly alder carr and has dried out to some extent, but the mixed sedge fen in the middle is bursting with wild flowers. Breeding birds include snipe, with its drumming mating display, and grasshopper warbler, identified by its reeling song.

Species and habitats

Species
Grass-of-Parnassus, Snipe

Nearby nature reserves

Hopton Fen
2 miles - Suffolk Wildlife Trust
Market Weston Fen
2 miles - Suffolk Wildlife Trust
Redgrave & Lopham Fen
3 miles - Suffolk Wildlife Trust

Nature reserve map

Reserve information

Location
Fen Lane, Thelnetham
Diss
Suffolk
IP22 1JX
Map reference
TM017786

GPS Info
Follow brown signs to Thelnetham Windmill heading north along Mill road. Take second right in to Fen Lane. Footpath heads north from road.

Great for...
birdwatching
spring flowers
Best time to visit
May - Sep
Get directions
Find out here
Public transport
Find out here
Opening Times
Open at all times
Size
8.80 hectares
Walking information
Can be muddy
Parking
Park in Thelnetham village
Dogs
Dogs must be on lead
Grazing animals
Cattle and ponies graze the fen
Reserve manager
Kerry Vaughan
Tel: 01379 687618
kerry.vaughan@suffolkwildlifetrust.org