Olive crescent moth (Trisateles emortualis)

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Olive Crescent
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Olive crescent moth fact file

Olive crescent moth description

KingdomAnimalia
PhylumArthropoda
ClassInsecta
OrderLepidoptera
FamilyNoctuidae
GenusTrisateles (1)

Adults of the rare Olive Crescent moth are orange-brown in colour with whitish cross-lines (3).

Size
Wingspan: 2.9- 3.5 cm (1)
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Olive crescent moth biology

A single-brooded species, adults fly in June and July. Caterpillars can be found between August and early October feeding on withered oak and beech leaves, either on the ground, on fallen branches, or on damaged branches still attached to the tree (1). The overwintering stage is the pupa(1).

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Olive crescent moth range

In the UK this species occurs in a small and declining population in the Chilterns in Buckinghamshire, and in two populations in Essex (2). The range extends through most of Europe to Siberia, northern Iran and China (2).

You can view distribution information for this species at the National Biodiversity Network Gateway.
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Olive crescent moth habitat

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Olive crescent moth status

Classified as Rare in Great Britain (2).

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Olive crescent moth threats

It is thought that changing woodland structure and new management techniques have affected the species (2).

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Olive crescent moth conservation

A Species Action Plan has been produced for the Olive Crescent moth, which aims to maintain the present populations of the species, and has proposed a programme of monitoring (2).

There may be further information about this species available via the National Biodiversity Network Gateway.
The UK Biodiversity Action Plan for this species is available at UK BAP.
View information on this species at the UNEP World Conservation Monitoring Centre.
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Authentication

Information authenticated by Sean Clancy.

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Glossary

Pupate
The process of forming a pupa, the stage in an insect's development, when huge changes occur that reorganise the larval form into the adult form. In butterflies the pupa is also called a chrysalis.
Single-brooded
(also known as 'univoltine'). Insect life cycle that takes 12 months to be complete, and involves a single generation. The egg, larva, pupa or adult over winters as a dormant stage.
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References

  1. Skinner, B. (1884) Moths of the British Isles. Penguin Books, Harmondsworth.
  2. UK BAP Species Action Plan (Dec 2002): http://www.ukbap.org.uk
  3. Personal observation from images.
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Image credit

Olive Crescent  
Olive Crescent

© David Green / British Butterfly Conservation Society Ltd

Butterfly Conservation
Manor Yard
East Lulworth
Wareham
Dorset
BH20 5QP
United Kingdom
Tel: +44 (0) 1929 400 209
info@butterfly-conservation.org
http://www.butterfly-conservation.org/

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