| 2024 | Moor Green Lakes, two, 4th-28th August (G. C. Stephenson). |
| 2024 | Chamberhouse Marsh, two, male, female, 17th May (A. B. Merrick). |
| 2024 | Datchet, two, male, female, 23rd April (C. D. R. Heard). |
| 2023 | Moor Green Lakes, juvenile, 17th-24th September (P. Scudamore). |
| 2023 | Lower Farm GP, juvenile, 2nd September (I. L. G. Weston). |
| 2023 | Eton Wick, 24th August to 8th September (C. D. R. Heard). |
| 2023 | Moor Green Lakes, two, 13th-25th August (K. P. Duncan). |
| 2023 | Moor Green Lakes, two, male, female, 5th-22nd April (H. Wright). |
| 2023 | Theale GPs, male, 4th-8th April (K. E. Moore). |
| 2023 | Lavell's Lake, male, 18th-24th March (D. N. T. Rimes). |
| 2022 | Moor Green Lakes, two, 20th September to 7th October (R. J. Godden). |
| 2022 | Wraysbury GPs, juvenile, 10th September (C. D. R. Heard). |
| 2022 | Dinton Pastures CP, juvenile, 20th-27th August (F. J. Cottington). |
| 2022 | Theale GPs, juvenile, 13th August (A. B. Merrick). |
| 2022 | Lea Farm Lake, juvenile, 30th-31st July (F. J. Cottington). |
| 2022 | Lower Farm GP, male, 3rd May (S. Ricks). |
| 2022 | Fobney Meadow, two, male, female, 2nd May (A. B. Tomczynski). |
| 2022 | Fobney Meadow, male, 26th March (R. Crawford). |
| 2022 | Lower Farm GP, male, 21st March (N. Dalton, M. J. Dear). |
| 2022 | Woolhampton GPs, five, three male, two female, 19th March (J. Taylor). |
| 2021 | Fleethill Farm, 19th September (R. J. Godden). |
| 2021 | Eton Wick, male, 13th-17th July (C. D. R. Heard). |
| 2021 | Wraysbury GPs, male, 3rd April (C. D. R. Heard). |
| 2021 | Horton Brook Quarry, three, including two male, 20th March (C. D. R. Heard). |
| 2020 | Eton Wick, juvenile, 13th-19th September (D. L. Cleal). |
| 2020 | Great Meadow Pond, juvenile, 26th June to 2nd August (D. J. Barker). |
| 2020 | Eton Wick, female, 13th-14th June (M. F. Walford). |
| 2020 | Moor Green Lakes, male, 15th May (J. D. Savage). |
| 2020 | Martin's Heron, two, male, female, 28th April (M. A. Johnstone). |
| 2020 | Dorney Wetlands, two, male, 23rd March (K. Rhodes). |
| 2020 | Padworth Lane floods, two, male, female, 22nd-23rd March (P. Hickman). |
| 2020 | Lower Farm GP, two, male, female, 18th March (G. J. Stewart). |
| 2020 | Eton Wick, two, male, 18th-19th March (C. D. R. Heard). |
| 2019 | Dinton Pastures CP, 6th-7th November (R. Marsh). |
| 2019 | Dinton Pastures CP, 26th August to 6th September (P. J. Newbound). |
| 2019 | Lea Farm Lake, 6th-31st August (A. B. Tomczynski). |
| 2019 | Dinton Pastures CP, 30th April to 6th May (Joe T). |
| 2019 | Burghfield GPs, two, 29th March to 2nd April (R. Price). |
| 2019 | Lower Farm GP, two, 22nd March (N. Cleere). |
| 2018 | Wraysbury GPs, 28th October (C. D. R. Heard). |
| 2018 | Eton Wick, 12th August to 4th September (D. L. Cleal). |
| 2018 | Lea Farm Lake, 28th June to 3rd July (F. J. Cottington). |
| 2018 | Lower Farm GP, two, 9th-10th June (J. E. Andrews, N. Cleere, J. Legg, I. L. G. Weston). |
| 2018 | Moor Green Lakes, two, 7th-9th June (R. C. Murfitt). |
| 2018 | Fobney Meadow, two, 25th May (A. B. Tomczynski). |
| 2018 | Theale GPs, 22nd-26th May (J. E. Andrews). |
| 2018 | Great Meadow Pond, 13th May (D. J. Barker). |
| 2018 | Horton Field Pits, two, 7th May (C. D. R. Heard). |
| 2018 | Fobney Meadow, four, 2nd April (A. B. Tomczynski). |
| 2017 | Lea Farm Lake, 26th September to 8th October. |
| 2017 | Dinton Pastures CP, 18th September. |
| 2017 | Heron Lake, male, 31st August (C. D. R. Heard). |
| 2017 | Queen Mother Reservoir, 24th August to 6th September. |
| 2017 | Lower Farm GP, two, 18th June (N. Cleere). |
| 2017 | Moor Green Lakes, 7th May. |
| 2017 | Theale GPs, 30th April (A. B. Tomczynski). |
| 2017 | Burghfield GPs, 23rd April (J. E. Andrews). |
| 2017 | Dinton Pastures CP, female, 18th-26th April. |
| 2017 | Dinton Pastures CP, male, 12th-18th April. |
| 2017 | Lower Farm GP, 8th April to 7th May. |
| 2017 | Padworth Lane GP, 5th April (K. E. Moore). |
| 2017 | Dinton Pastures CP, female, 24th-29th March. |
| 2017 | Fobney Meadow, two, 17th March to 26th April. |
| 2017 | Dinton Pastures CP, male, 11th-17th March. |
| <2017 | Many records. |
