Beckingham Marsh is the best place in the Gainsborough area for waders. Lapwings are resident there and can always be seen in varying numbers, from a dozen or more at anytime of the year, up to flocks of 100-200 in the winter.
I sometimes see Oystercatchers and Redshank there, and there were 2 Golden Plovers on Feb 2nd 2018.
The warden at Beckingham Marsh has reported seeing Curlew, Snipe, Greenshank, Green Sandpiper and Black-tailed Godwit, but they have all eluded me.
From left to right: Lapwing, Oystercatcher, Redshank, Curlew, Snipe (pictures from Wikipedia)
There were 2 Avocets at Beckingham Marsh on May 2nd 2017 (with Idle Valley near Retford also reporting Avocets at the same time). They are a breeding bird at the Blacktoft Sands reserve near Goole (I have seen them there too in the past), so these two may have been on their way there.
Avocet (picture from Wikipedia)
Elsewhere, a huge mixed flock of Lapwings and Golden Plovers spent the winter of 2017-18 in a flooded field off Walkerith Road. I counted over 1000 of each species there on Feb 1st. The Golden Plovers had dwindled to 200+ by March, and to 50+ by April (with many in their breeding plumage). They’ve all gone now, but some of the Lapwings are still there.
Golden Plover (picture from Wikipedia)
I sometimes see small numbers of Lapwings along Field Lane between Morton and Walkerith, and 40 flew over Gainsborough on Dec 2nd 2017.
1 or 2 Oystercatchers have occasionally turned up on the Riverside at Gainsborough or Morton. Two flew by Mercer Wood on Mar 22nd 2018, and one flew by on Jul 3rd 2018.
There was one Redshank on the riverside at Morton on May 18th 2013.