| Date | Site | OS Grid Ref | Stage | Quantity | Comment |
|---|---|---|---|---|---|
| 13 Nov 2021 | Ellesmere Port | SJ3878 | Mine | 1+ | On elm. |
| 09 Nov 2021 | Willaston | SJ3378 | Mine | 1+ | On elm. |
| 03 Nov 2021 | Ellesmere Port | SJ3778 | Mine | 1+ | On elm. |
| 28 Oct 2021 | Ellesmere Port | SJ3779 | Mine | 1+ | On elm. |
| 25 Oct 2021 | Hooton | SJ3478 | Mine | 1+ | On elm. |
| 25 Oct 2021 | Willaston | SJ3378 | Mine | 1+ | On elm. |
| 16 Oct 2021 | Gowy Meadows CWT | SJ4374 | Mine | 1 | |
| 10 Oct 2021 | Common Lane, Waverton | SJ455639 | Mine | 1 | on elm |
| 09 Oct 2021 | Gowy Meadows CWT | SJ4374 | Mine | 1 | |
| 19 Sep 2021 | Ness | SJ3075 | Mine | 1+ | On elm. |
| 14 Aug 2021 | Waverton | SJ4563 | Larval | 1 | on elm, Quarry Lane, SJ457635 |
| 04 Aug 2021 | Waverton | SJ4663 | Larval | 1 | green pupa. Green looms walk, Salmon’s Bridge, SJ464633 |
| 04 Nov 2020 | Goostrey | SJ7870 | Mine | 1+ | on elm |
| 19 Oct 2020 | Lower Whitley | SJ6179 | Mine | 1+ | on elm |
| 17 Oct 2020 | Pickmere | SJ6977 | Mine | 1+ | On elm. |
| 17 Oct 2020 | Pickmere | SJ6877 | Mine | 1+ | On elm. |
| 17 Oct 2020 | Pickmere | SJ6876 | Mine | 1+ | On elm. |
| 15 Oct 2020 | Betchton | SJ7659 | Mine | 1 | on elm |
| 07 Oct 2020 | Lostock Gralam | SJ6875 | Mine | 1+ | on elm |
| 04 Oct 2020 | Stoak | SJ4273 | Mine | 1+ | On elm. |
| 04 Oct 2020 | Little Stanney | SJ4173 | Mine | 1+ | On elm. |
| 29 Sep 2020 | Manor Park | SJ6965 | Mine | 1+ | on elm |
| 29 Sep 2020 | Clive Green | SJ6865 | Mine | 1+ | on elm |
| 28 Sep 2020 | Antrobus | SJ6580 | Mine | 1+ | On elm. |
| 27 Sep 2020 | Higher Whitley | SJ6280 | Mine | 1+ | On elm. |
| 22 Sep 2020 | Comberbach | SJ6377 | Mine | 1+ | On elm. |
| 21 Sep 2020 | Lower Whitley | SJ6179 | Mine | 1+ | On elm. |
| 21 Sep 2020 | Henbury | SJ8573 | Mine | 1+ | on elm |
| 19 Sep 2020 | Weaver Valley, Whitegate | SJ6370 | Mine | 1+ | on elm |
| 19 Sep 2020 | Whitegate | SJ6369 | Mine | 1+ | on elm |
| 15 Sep 2020 | Common Lane, Waverton | SJ455639 | Mine | 1 | green pupa in leaf fold on elm |
| 08 Sep 2020 | Common Lane, Waverton | SJ455639 | Mine | 1 | adult emerged 2nd Mar 2021 |
| 09 Aug 2020 | Ash Brook, Darnhall | SJ6562 | Mine | 1 | on elm |
| 10 Nov 2019 | Marston | SJ6775 | Mine | 1+ | |
| 27 Oct 2019 | Astbury | SJ8461 | Mine | 1 | |
| 27 Oct 2019 | Moreton cum Alcumlow | SJ8359 | Mine | 1 | |
| 27 Oct 2019 | Moreton cum Alcumlow | SJ8259 | Mine | 1+ | |
| 24 Oct 2019 | Wallasey | SJ2993 | Mine | 1+ | On elm. |
| 21 Oct 2019 | Bunbury | SJ5657 | Mine | 1+ | On elm. |
| 21 Oct 2019 | Chorley | SJ5751 | Mine | 1+ | On elm. |
| 17 Oct 2019 | Cranberry Moss, Eaton | SJ8664 | Mine | 1 | |
| 17 Oct 2019 | Wallasey Dunes | SJ2792 | Mine | 1+ | On elm. |
| 14 Oct 2019 | Capenhurst | SJ3673 | Mine | 1+ | On elm. |
| 14 Oct 2019 | Meols | SJ2290 | Mine | 1+ | On elm. |
| 10 Oct 2019 | Meols | SJ2390 | Mine | 1+ | On elm. |
| 07 Oct 2019 | Gowy Meadows CWT | SJ4374 | Mine | 1 | |
| 24 Sep 2019 | Claughton | SJ3087 | Mine | 1+ | On elm. |
| 19 Sep 2019 | Alpraham | SJ5959 | Mine | 1+ | On elm. |
| 17 Sep 2019 | Knutsford | SJ7477 | Mine | 2 | |
| 15 Sep 2019 | Coppenhall | SJ7057 | Mine | 1+ | |
| 05 Sep 2019 | Tabley | SJ7276 | Mine | 1+ | |
| 05 Sep 2019 | Tabley Inferior | SJ7377 | Mine | 1+ | |
| 25 Aug 2019 | Leighton | SJ6857 | Mine | 2 | |
| 21 Aug 2019 | Henbury | SJ8874 | Mine | 2 | |
| 25 May 2019 | Common Lane, Waverton | SJ455639 | Adult | 1 | adult found in leaf liter from elm |
| 05 Nov 2018 | Beeston | SJ5358 | Mine | 1+ | On elm. |
| 02 Nov 2018 | Lower Wych | SJ4945 | Mine | 1+ | On elm. |
| 31 Oct 2018 | Milton Green | SJ4558 | Mine | 1+ | On elm. |
| 30 Oct 2018 | Handley | SJ4657 | Mine | 1+ | On elm. |
| 29 Oct 2018 | Milton Green | SJ4658 | Mine | 1+ | On elm. |
| 29 Oct 2018 | Coddington | SJ4456 | Mine | 1+ | On elm. |
| 29 Oct 2018 | Bolesworth | SJ4956 | Mine | 1+ | On elm. |
| 29 Oct 2018 | Tattenhall | SJ4957 | Mine | 1+ | On elm. |
| 28 Oct 2018 | Tattenhall | SJ4857 | Mine | 1+ | On elm. |
| 24 Oct 2018 | Norbury | SJ5547 | Mine | 1+ | On elm. |
| 24 Oct 2018 | Marbury | SJ5645 | Mine | 1+ | On elm. |
| 19 Oct 2018 | Wirswall | SJ5544 | Mine | 1+ | On elm. |
| 18 Oct 2018 | New Brighton | SJ3094 | Mine | 1+ | On elm. |
| 15 Oct 2018 | Edge Green | SJ4850 | Mine | 1+ | On elm. |
| 07 Oct 2018 | Marston | SJ6774 | Mine | 1 | |
| 01 Oct 2018 | Alsager | SJ8054 | Mine | 1 | |
| 29 Sep 2018 | Weaverham | SJ6173 | Mine | 1+ | On elm. |
| 29 Sep 2018 | Occlestone Green | SJ6962 | Mine | 1 | |
| 15 Sep 2018 | Adlington | SJ9382 | Mine | 8 | |
| 29 Aug 2018 | Common Lane, Waverton | SJ455639 | Mine | 1 | on elm, green cocoon |
| 15 Nov 2017 | Huntington | SJ4363 | Mine | 1 | On elm. |
| 15 Nov 2017 | Saighton | SJ4462 | Mine | 1 | On elm. |
| 14 Nov 2017 | Bruera | SJ4360 | Mine | 1 | On elm, |
| 13 Nov 2017 | Burton | SJ5063 | Mine | 1 | On elm. |
| 13 Nov 2017 | Burton | SJ5163 | Mine | 1 | On elm. |
| 06 Nov 2017 | Aston | SJ5578 | Mine | 1 | On elm. |
| 01 Nov 2017 | Handbridge | SJ4164 | Mine | 1 | |
| 01 Nov 2017 | Eccleston | SJ4062 | Mine | 4 | |
| 31 Oct 2017 | Frankby | SJ2486 | Mine | 1 | On elm. |
| 29 Oct 2017 | Nantwich | SJ6451 | Mine | 1+ | |
| 28 Oct 2017 | Brimstage | SJ3083 | Mine | 1 | On elm. |
| 25 Oct 2017 | Caughall Bridge | SJ4171 | Mine | 2 | |
| 18 Oct 2017 | Parkgate | SJ2778 | Mine | 2 | Parkgate Old Baths SJ273789 |
| 18 Oct 2017 | Upton | SJ2688 | Mine | 1 | On elm. |
| 13 Oct 2017 | Saughall | SJ3770 | Mine | 1 | On elm. |
| 12 Oct 2017 | Denhall Lane, Burton | SJ2975 | Mine | 2 | |
| 12 Oct 2017 | Capenhurst | SJ3673 | Mine | 1 | On elm. |
| 10 Oct 2017 | Dunham Heath | SJ4871 | Mine | 1 | On elm. |
| 09 Oct 2017 | Hooton | SJ3577 | Mine | 1 | On elm. |
| 08 Oct 2017 | Mickle Trafford | SJ4470 | Mine | 1 | On elm. |
| 08 Oct 2017 | Dunham-on-the-Hill | SJ4672 | Mine | 1 | On elm. |
| 06 Oct 2017 | Plemstall | SJ4570 | Mine | 1 | On elm. |
| 06 Oct 2017 | Thornton-le-Moors | SJ4474 | Mine | 1 | |
| 04 Oct 2017 | Little Stanney | SJ4073 | Mine | 1 | On elm |
| 04 Oct 2017 | Little Stanney | SJ4173 | Mine | 1 | On elm. |