Where's the Whimbrel?

The Turnstone was still present at Collingham Pits first thing this morning, first on Ferry Lane Farm Pit, before moving the Main Pit. The latter also hosted a Ringed Plover and 2 Common Sandpipers, with a Whimbrel flying over unseen just after 9am - it called several times and was clearly heading south, but I couldn't for the life of me see it! My first of the year at this site. Ferry Lane Farm Pit also held single Greenshank, Dunlin and LRP, at least 5 Common and 4 Green Sands, plus 6 Little Egrets. Nearby, there were 3 Common Sands  and 4 Snipe on Mons Pool.