| Family: | Ypsolophidae |
| Subfamily: | Ypsolophinae |
| Genus: | Ypsolopha |
| Species: | horridella |
| Authority: | (Treitschke, 1835) |


The abundance in each month is indicated as follows:
No records
Very occasional
Irregular
Uncommon
Off-peak, but not unusual
Off-peak, but not unusual
Main flight time| J | F | M | A | M | J | J | A | S | O | N | D | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Adult | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
| Larval | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
| Site | Date | Quantity | Recorder | Stage |
|---|---|---|---|---|
| Martin Down NNR (SU01) | 24/08/1990 | - | Bishop, Darch, Taylor, Lancaster, Greenway, Blunt, Cartwright | - |
| Site | Date | Quantity | Recorder | Stage |
|---|---|---|---|---|
| Freshwater (SZ38) | 19/08/2001 | one | Sam Knill-Jones | Adult |
| Jersey Camp (SZ49) | 08/08/2016 | one | Ian Merrifield | Adult |
| PLUTO Pumphouse (SZ68) | 07/09/2016 | one | Rob Wilson | Adult |
| West High Down Quarry (SZ38) | 07/08/2020 | three | Iain Outlaw | Adult |
| West High Down Quarry (SZ38) | 20/08/2020 | one | Iain Outlaw | Adult |
| Site | Date | Quantity | Recorder | Stage |
|---|---|---|---|---|
| Rowner (SU50) | 30/07/1976 | one | Richard J Dickson | Adult |
| Mallard Wood, NF (SU30) | 1985 | - | D H, M J & P H Sterling | - |
| Mallard Wood, NF (SU30) | 05/06/1985 | one | J R Langmaid, E C Pelham-Clinton, D H Sterling | Larval |
| Portsdown (SU60) | 07/08/1992 | one | J R Langmaid, P R Durnell, M, G Roberts | Adult |
| Hayling (SU70) | 23/08/2003 | - | J R Langmaid, B Elliott | Adult |
| Portchester Common SSSI (SU60) | 13/08/2004 | one | Richard J Dickson | Adult |
| Hayling Island (SZ79) | 06/08/2005 | one | Tim Norriss, Mike Wall, Nick Montegriffo et al | Adult |
| Brownwich cliffs (SU50) | 10/08/2012 | one | Tony Tindale | Adult |
| Brownwich cliffs (SU50) | 07/09/2012 | one | Tony Tindale | Adult |
| Broughton (SU33) | 06/09/2021 | one | Glynne Evans | Adult |
| Waterlooville (SU60) | 31/07/2023 | one | David Wheatley | Adult |
| Site | Date | Quantity | Recorder | Stage |
|---|---|---|---|---|
| Wildhern (SU35) | 11/08/1998 | - | David G Green | Adult |
| Old Basing (SU65) | 02/08/2003 | one | Mike Wall | Adult |
| Leckford Golf Course (SU33) | 06/08/2018 | one | Glynne Evans | Adult |
| Goodworth Clatford (SU34) | 24/08/2019 | one | Glynne Evans | Adult |
| Yateley (SU86) | 08/11/2020 | one | Josie Hewitt | Adult |
| Barton Stacey (SU44) | 02/09/2021 | one | Glynne Evans | Adult |
| Longparish (SU44) | 21/07/2022 | one | Glynne Evans | Adult |
| Blackwater (SU85) | 27/07/2022 | one | Ben Dale | Adult |
| Cole Henley (SU45) | 23/08/2022 | one | Glynne Evans | Adult |
| North Waltham (SU54) | 27/07/2023 | one | Andy Jones | Adult |
| Barton Stacey (SU44) | 08/08/2023 | one | Glynne Evans | Adult |
| Littleton (SU43) | 10/08/2023 | one | Glynne Evans | Adult |
| Site | Date | Quantity | Recorder | Stage |
|---|---|---|---|---|
| Mortimer West End (SU66) | 15/07/2020 | one | Graham Dennis | Adult |