| Date | Site | OS Grid Ref | Stage | Quantity |
|---|---|---|---|---|
| 15 Jun 2023 | Holly Court, Helsby | SJ492760 | Larval | 4 |
| 14 Jun 2023 | Brookledge Lane, Adlington | SJ918803 | Larval | 1 |
| 01 Jul 2022 | Chester | SJ4267 | Larval | 1+ |
| 18 May 2022 | Hob Hey Wood, Frodsham | SJ5377 | Larval | 1 |
| 16 May 2021 | Frodsham Marsh | SJ4979 | Larval | 200 |
| 06 Sep 2020 | Frodsham Marsh | SJ4979 | Adult | 80 |
| 29 Jul 2020 | Frodsham Marsh | SJ4979 | Adult | 100 |
| 01 Jul 2020 | Frodsham Marsh | SJ4979 | Adult | 10 |
| 30 Jun 2020 | Frodsham Marsh | SJ5078 | Adult | 100 |
| 28 Jun 2020 | Frodsham Marsh | SJ4979 | Adult | 100 |
| 23 Jun 2020 | Frodsham Marsh | SJ4979 | Adult | 5 |
| 15 Jun 2020 | Vicars Cross | SJ4366 | Larval | 1 |
| 23 May 2020 | Vicars Cross | SJ4366 | Larval | 1 |
| 17 May 2020 | Frodsham Marsh | SJ5078 | Larval | 1 |
| 16 May 2020 | Frodsham Marsh | SJ5078 | Larval | 1 |
| 16 May 2020 | Northwich | SJ6674 | Larval | 1+ |
| 14 May 2020 | Frodsham Marsh | SJ4977 | Larval | 1 |
| 12 May 2020 | Frodsham Marsh | SJ4979 | Larval | 1750000 |
| 29 May 2019 | Chester Zoo | SJ4070 | Larval | 1 |
| 2019 | Chester | SJ4267 | Larval | 1+ |
| 10 Jul 2018 | Chester | SJ4267 | Larval | 1+ |
| 22 Jun 2017 | Puddington | SJ3372 | Adult | 100 |
| 31 May 2017 | Haslington | SJ7356 | Larval | 500 |
| 29 May 2017 | Frodsham Marsh | SJ5077 | Larval | 1+ |
| 23 May 2017 | Puddington | SJ3372 | Larval | 1+ |
| 22 May 2017 | Chester | SJ4267 | Larval | 1+ |
| 22 May 2017 | Common Lane, Waverton | SJ455639 | Larval | 3 |
| 22 Jun 2014 | Frodsham Marsh | SJ4978 | Larval | 1+ |
| 26 May 2014 | Frodsham Marsh | SJ4978 | Larval | 1+ |
| 05 Sep 2013 | Frodsham Marsh | SJ5078 | Adult | 10 |
| 04 Sep 2013 | Frodsham Marsh | SJ5078 | Adult | 10 |
| 08 Aug 2013 | Frodsham Marsh | SJ5078 | Adult | 250 |
| 04 Aug 2013 | Frodsham Marsh | SJ4978 | Larval | 140 |
| 13 Jun 2013 | Frodsham Marsh | SJ5078 | Larval | 100000 |
| 26 Aug 2012 | Frodsham Marsh | SJ4978 | Adult | 240 |
| 23 Aug 2012 | Frodsham Marsh | SJ5078 | Larval | 2000 |
| 19 Aug 2012 | Frodsham Marsh | SJ4978 | Adult | 1 |
| 18 Aug 2012 | Frodsham Marsh | SJ4978 | Larval | 150 |
| 02 Aug 2012 | Frodsham Marsh | SJ5078 | Larval | 750 |
| 01 Aug 2012 | Frodsham Marsh | SJ4978 | Larval | 5000 |
| 28 Jul 2012 | Frodsham Marsh | SJ4978 | Larval | 10 |
| 26 Jul 2012 | Frodsham Marsh | SJ5078 | Larval | 150 |
| 08 Sep 2011 | Frodsham | SJ5075 | Adult | 40 |
| 04 Sep 2011 | Frodsham Marsh | SJ4978 | Adult | 2 |
| 01 Sep 2011 | Frodsham | SJ5075 | Adult | 200 |
| 20 Aug 2011 | Frodsham Marsh | SJ4978 | Adult | 1150 |
| 29 Jul 2011 | Frodsham Marsh | SJ4978 | Adult | 100 |
| 24 Jul 2011 | Frodsham Marsh | SJ5078 | Adult | 1+ |
| 24 Jul 2011 | Frodsham Marsh | SJ4978 | Adult | 1+ |
| 14 Jul 2011 | Frodsham | SJ5075 | Adult | 2000 |
| 10 Jul 2011 | Frodsham Marsh | SJ4978 | Adult | 2900 |
| 12 May 2011 | Frodsham Marsh | SJ4978 | Larval | 1+ |
| 10 Sep 2010 | Frodsham Marsh | SJ4978 | Adult | 900 |
| 08 Sep 2010 | Frodsham Marsh | SJ5078 | Adult | 100 |
| 21 Aug 2010 | Frodsham Marsh | SJ4979 | Adult | 1170 |
| 22 Jul 2010 | Frodsham Marsh | SJ5078 | Adult | 1000 |
| 08 Sep 2009 | Frodsham Marsh | SJ5078 | Adult | 519 |
| 05 Sep 2009 | Frodsham Marsh | SJ5078 | Adult | 200 |
| 24 May 2009 | Stoak | SJ4273 | Larval | 10 |
| 23 May 2009 | Frodsham Marsh | SJ5078 | Larval | 1000 |
| 10 May 2009 | Frodsham Marsh | SJ4978 | Larval | 500 |
| 14 Aug 2008 | Frodsham Marsh | SJ4978 | Adult | 40 |
| 31 Jul 2008 | Frodsham Marsh | SJ4978 | Adult | 20 |
| 27 Jul 2006 | Frodsham Marsh | SJ4978 | Adult | 40 |
| 11 Aug 2005 | Frodsham Marsh | SJ495785 | Adult | 10 |
| 03 Jun 2003 | Frodsham Marsh | SJ5077 | Adult | 15 |
| 11 May 2003 | Sharston | SJ8388 | Larval | 1+ |
| 27 Aug 2001 | Frodsham Marsh | SJ5078 | Adult | 8 |
| 23 Aug 2001 | Frodsham Marsh | SJ5078 | Adult | 20 |
| 1948 | Goyt Valley | SK0172 | Not recorded | 1+ |
| 1948 | Castle Mill | SJ7984 | Not recorded | 1+ |
| 1940 | Cheshire | Unknown | Not recorded | 1+ |
| 1854 | Birkenhead | SJ3089 | Not recorded | 1+ |