ABH 70.237

Early Thorn Selenia dentaria

BF 1917

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(Linnaeus, 1761)
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Phenology

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Family

Geometridae » Ennominae

Wingspan

28-40 mm.
   

Description

Resting distinguishes Early Thorn from all other British Thorns. It holds its wings up over its back and pressed together like a butterfly.Melanic forms occur fairly regularly in parts of northern England. Spring brood Adults are generally more numerous, larger, and more richly marked than those of the second generation. Wings are scalloped and there are 3 crosslines on the forewings. There is a dark patch at the apex of the forewing.

Melanic forms occur fairly regularly in parts of northern England.
The summer brood, which appears in August and September, usually produces smaller and paler moths.

Key Identification Features:

Only spring-flying thorn species
Double-brooded
Scalloped wings
Three distinct crosslines on forewings
Small dark patch at apex of forewings

   

Life Cycle

There are two distinct generations (except in the far north), the first of which flies in April and May. The summer brood, which appears in August and September, usually produces smaller and paler moths.
 

Habitat

Common in woodland, scrubby heathland, hedgerows, gardens and parks throughout much of the British Isles.
   

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Early Thorn 21611