Lapwings are among the birds affected by the floods
Floods on a nature reserve in Cambridgeshire have wiped out the nesting season for wading birds for a second successive year.
Hundreds of lapwings, redshanks and snipe on the meadows of the Ouse Washes have lost eggs or chicks.
Another 900 pairs of ducks have also lost their nests and eggs.
The Ouse Washes are now flooded bank to bank and the RSPB said it showed the urgent need to create new wet meadows in the Fens.
The Ouse Washes are a 19-mile (30 km) stretch of seasonally flooded wet grassland between Earith and Denver and cover 2,400 hectares, mostly in Cambridgeshire, but partly in Norfolk.
Jon Reeves, RSPB Ouse Washes site manager, said: "The current state of the Ouse Washes is so frustrating for me and my team.
"As well as losing so many birds' nests yet again, with the most of the washes under water since last May we cannot get out there to manage the reserve."