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A rare Red Data Book species, in oak woodland in parts of southern England, a priority species under the UK Biodiversity Action Plan. Extremely erratic in its appearance, occurring commonly in one of its haunts for a few years, then declining to a very low ebb. Nationally only seen in numbers in parts of Surrey (particularly the central southern Surrey commons around Leatherhead, and in the extreme north-west) although it does survive in low density in a few other counties of southern England. In Hampshire the only recent records are of two in Pamber Forest in July 1993 and of one in Mortimer West End in July 1997. Not recorded from the Isle of Wight to date. Wingspan 32-38 mm. Characterised by heart-shaped reniform stigmata. Larva feeds on Pedunculate Oak, over-wintering as an egg.
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Flightime guide |
| Stage | J | F | M |
A | M | J |
J | A | S |
O | N | D |
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Detail records |
| Site | Date | Quantity | Recorder | Stage |
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| VC11 South Hampshire |
| Hollands Wood (SU30) | 1871 | - | Farn, AB | Adult |
| Hollands Wood (SU30) | 1871 | - | Farn, AB | Adult |
| Hollands Wood (SU30) | 1871 | - | Unknown | Adult |
| Clay Hill, Burley, New Forest (SU30) | 1871 | - | Unknown | Adult |
| New Forest (SU30) | 1928 | - | Not known | - |
| New Forest (SU30) | 1928 | - | Anon | - |
| (SU40) | 1951 | - | Not known | - |
| (SU40) | 1961 | one | BRC | - |
| Bursledon (SU40) | 17-Jul-1969 | one | Watkinson, IA | Adult |
| Bursledon (SU40) | 17-Jul-1969 | one | Watkinson, IA | Adult |
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| VC12 North Hampshire |
| Pamber Forest and Silchester Common SSSI (SU66) | 1800 | - | Anon | - |
| Pamber Forest and Silchester Common SSSI (SU66) | 1800 | - | Not known | - |
| (SU85) | 1900 | - | Not known | - |
| (SU54) | 1900 | one | BRC | - |
| Hawley (SU85) | 26-Jun-1948 | two | Richards, AW | Adult |
| Pamber Forest (SU66) | 24-Jul-1948 | - | Baker, B | Adult |
| (SU66) | 1951 | - | Not known | - |
| (SU73) | 1951 | - | Not known | - |
| (SU54) | 1951 | - | Not known | - |
| Pamber Forest (SU66) | 05-Jul-1952 | - | Baker, B | Adult |
| Whitehill (SU73) | 1955 | one | Wright, D | Adult |
| Micheldever (SU54) | 27-Jun-1960 | one | Dixon, CH | Adult |
| (SU75) | 1961 | one | BRC | - |
| Little London (SU65) | 23-Jul-1977 | one | Vick, GS | Adult |
| Ashford Hill Woods and Meadows (SU56) | 1979 | - | NCC | - |
| Ashford Hill Woods and Meadows (SU56) | 1979 | - | NCC | - |
| Wheathold (SU56) | 1981 | two | Brough, DCG | Adult |
| (SU56) | 1981 | - | Not known | - |
| (SU66) | 1981 | - | Not known | - |
| (SU76) | 1981 | - | Not known | - |
| Wellington CP (SU76) | 1986 | three | Baker, B | Adult |
| Wellington CP (SU76) | 1986 | three | Baker, B | Adult |
| Pamber Forest (SU66) | 01-Jul-1993 | - | Dennis, GJ | Adult |
| Pamber Forest (SU66) | 17-Jul-1993 | - | Dennis, GJ | Adult |
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| VC22 West Berkshire (Hants county) |
| Mortimer (SU66) | 01-Jul-1997 | one | Dennis, Graham | Adult |
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