Home

 

 
Butterflies of Europe
Blue-spot Hairstreak
Satyrium spini   DENIS & SCHIFFERMULLER, 1775
Family - LYCAENIDAE
subfamily - THECLINAE

Blue-spot Hairstreak Satyrium spini, Velebit Mts, Croatia  Peter Bruce-Jones
Introduction

There are 64 described species in the genus Satyrium, which has at various times been known by the invalid synonyms Neolycaena, Nordmannia, Pseudothecla and Strymonidia. The genus occurs across the temperate, sub-arctic and subtropical regions of the northern hemisphere.

There are 7 species in Europe - acaciae, ilicis, esculi, spini, w-album, pruni and ledereri; of which only w-album and pruni occur in Britain.

Satyrium spini is found in Portugal, Spain, France, Italy, Switzerland, Austria, Germany, Poland, Hungary, Croatia, Greece, Turkey, and east to Iraq and Iran.

Habitats

This species is found mainly in hot, dry, scrubby habitats including woodland clearings, grassland, lightly wooded mountainsides and bushy meadows; typically at altitudes between sea level and about 1500m, although colonies occur as high as 2000m in Greece.

Lifecycle
The Blue-spot Hairstreak is single-brooded, flying from late May to early August depending on locality and altitude.
The eggs are usually laid in groups of between 3-5 on woody twigs of the foodplants, usually close to a fork. They are a dirty whitish colour with a prominent micropyle, and are covered in a fine network polygonal depressions. The caterpillars are fully formed within the eggs shortly after they are laid in the summer, but do not hatch until the following March.
The caterpillar is woodlouse-shaped but with well defined segments. It is green, slightly hairy, and marked along the back with a pair of broken cream stripes. There are a series of forward-slanting suffused creamy diagonal bars along the sides, and a solid cream line below the spiracles. If feeds on Rhamnus ( buckthorn ), usually resting on the underside of the stems or leaves. In common with most other Lycaenidae species the larvae are tended by ants which "milk" them to obtain sugary substances secreted from their dorsal gland.
The chrysalis is attached by a fine silken girdle to the underside, or occasionally to the upperside, of a living leaf of the foodplant. It is pale brown, heavily speckled. It is plump in form, rounded at the head and tail, and covered in short bristly hairs.
Adult behaviour
The adults can easily be overlooked due to their reclusive and sedentary nature, and are normally only seen in two's or three's, although occasionally colonies of 100 or more can be found.
Both sexes nectar at the flowers of a wide variety of herbaceous plants including wood spurge, yarrow, lavender, stonecrop and thyme. They also visit the flowers of bramble bushes.
 

 

Contact  /  About me

Butterfly-watching holidays

Trip reports

UK latest sightings

Frequently asked questions

Strange but true !

Taxonomy & Evolution

Anatomy

Lifecycle

Enemies of butterflies

Survival strategies

Migration & dispersal

Habitats - UK / Palaearctic

Habitats - Tropical rainforests

Butterfly world census

Butterflies of the World :

British Isles

Europe

Amazon & Andes

North America

temperate Asia

Africa

Indian subcontinent

Malaysia & Borneo

Papua New Guinea

Australia & N.Z.

Insects of Britain & Europe

Insects of Amazonia

Moths of the Andes

Saturniidae - Silkmoths

Caterpillars of the World

Butterfly Photography

Recommended Books

Glossary

Links

Code of practice

Copyright - text & images

Copyright - text & images

X

X

X

X

 

All photographs, artwork, text & website design are the property of Adrian Hoskins ( unless otherwise stated ) and are protected by Copyright. Photographs or text on this website must not be reproduced in part or in whole or published elsewhere without prior written consent of Adrian Hoskins / learnaboutbutterflies.com

Site hosted by Just Host