Main: (Noctuidae / Xyleninae)
73.218 [B&F: 2315] Heart Moth (Dicycla oo) (Linnaeus, 1758)


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.

Flightime guide

Phenology - Adult Records

Max records: 3
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Distribution Map

Historical distribution at tetrad resolution
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Record Density

As above but the larger the symbol, the greater the number of records
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Detail records

VC11 South Hampshire
Hollands Wood (SU30)1871-Farn, ABAdult
Hollands Wood (SU30)1871-Farn, ABAdult
Hollands Wood (SU30)1871-UnknownAdult
Clay Hill, Burley, New Forest (SU30)1871-UnknownAdult
New Forest (SU30)1928-Not known-
New Forest (SU30)1928-Anon-
(SU40)1951-Not known-
Bursledon (SU40)17-Jul-1969oneWatkinson, IAAdult
Bursledon (SU40)17-Jul-1969oneWatkinson, IAAdult
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-
Hawley (SU85)26-Jun-1948twoRichards, AWAdult
Pamber Forest (SU66)24-Jul-1948-Baker, BAdult
(SU66)1951-Not known-
(SU73)1951-Not known-
(SU54)1951-Not known-
Pamber Forest (SU66)05-Jul-1952-Baker, BAdult
Whitehill (SU73)1955oneWright, DAdult
Micheldever (SU54)27-Jun-1960oneDixon, CHAdult
Little London (SU65)23-Jul-1977oneVick, GSAdult
Ashford Hill Woods and Meadows (SU56)1979-NCC -
Ashford Hill Woods and Meadows (SU56)1979-NCC -
Wheathold (SU56)1981twoBrough, DCGAdult
(SU56)1981-Not known-
(SU66)1981-Not known-
(SU76)1981-Not known-
Wellington CP (SU76)1986threeBaker, BAdult
Wellington CP (SU76)1986threeBaker, BAdult
Pamber Forest (SU66)01-Jul-1993-Dennis, GJAdult
Pamber Forest (SU66)17-Jul-1993-Dennis, GJAdult
VC22 West Berkshire (Hants county)
Mortimer (SU66)01-Jul-1997oneDennis, GrahamAdult

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