Knot swirling in massive flock over the mud flats at the RSPB's Snettisham nature reserve, NorfolkLines of different wader species on the mud flats at the RSPB's Snettisham nature reserve, NorfolkPurple sandpiper on a rocky beachPurple sandpiper on a rocky beachClose up portrait of a redshank in waterRedshank foraging in waterRedshank coming in to land, wings outstretchedRedshank standing in water with reflectionBlack-tailed godwit standing in waterBlack-tailed godwit eating prey caught in the waterGrey plover standing in water with reflectionOystercatcher calling in flight, Shiants IslesSix knot feeding on a beachTurnstone standing on plinthTurnstone feeding on a wormWaders feeding on the tide edgeFlagged bar-tailed godwit feeding in water's edgeColour ringed turnstone feedingColour ringed turnstone looking for foodColour ringed turnstone