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Nationally scarce (Nb) in open woodland and gardens throughout southern England and northern Wales. Barely annual in Hampshire, where recorded widely, but only regular on the coast in the south-east of the county; very rare on the Isle of Wight. Wingspan 16-21 mm. Positioning and size of scale tufts on dorsum, and fuscous colouring distinguish Y. horridella from its congeners. Larva feeds on Apple and Blackthorn, beneath a silken web, over-wintering as an egg.
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Flightime guide |
| 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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| VC8 Wiltshire (Hants county) |
| Martin Down (SU01) | 24-Aug-1990 | - | Bishop et al | - |
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| VC10 Isle of Wight |
| Freshwater (SZ38) | 19-Aug-2001 | one | Knill-Jones, SA | Adult |
| Jersey Camp (SZ49) | 08-Aug-2016 | one | Merrifield, I | Adult |
| PLUTO Pumphouse (SZ68) | 07-Sep-2016 | one | Wilson, R | Adult |
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| VC11 South Hampshire |
| Rowner (SU50) | 30-Jul-1976 | one | Dickson, RJ | Adult |
| Mallard Wood, New Forest (SU30) | 1985 | - | Sterling, DH; Sterling, MJ; Sterling, PH | - |
| Mallard Wood, New Forest (SU30) | 05-Jun-1985 | one | Langmaid, JR; Pelham-Clinton, EC; Sterling, DH | Larval |
| Portsdown (SU60) | 07-Aug-1992 | one | Langmaid, JR; Durnell, PR; Roberts, M & G | Adult |
| Stoke, Hayling (SU70) | 23-Aug-2003 | - | Langmaid, JR; Elliott, B | Adult |
| Portsdown (SU60) | 13-Aug-2004 | one | Dickson, RJ | Adult |
| Sandy Point LNR (SZ79) | 06-Aug-2005 | one | Norriss, TJ; Wall, MJ; Montegriffo, NJ et al | Adult |
| Brownwich (SU50) | 10-Aug-2012 | one | Tindale, A | Adult |
| Brownwich (SU50) | 07-Sep-2012 | one | Tindale, A | Adult |
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| VC12 North Hampshire |
| Wildhern (SU35) | 11-Aug-1998 | - | Green, DG | Adult |
| Old Basing (SU65) | 02-Aug-2003 | one | Wall, MJ | Adult |
| Leckford (SU33) | 06-Aug-2018 | one | Evans, GC | Adult |
| Goodworth Clatford (SU34) | 24-Aug-2019 | one | Evans, GC | Adult |
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