Aeshna isosceles (Norfolk hawker)

This dragonfly is restricted to one area of Britain - the broads district of Norfolk. It has been scarce and local in Britain since records began.

It is now categorised as endangered in Britain and is listed in schedule 5 of the Wildlife and Countryside Act 1981.

In Britain, this endangered species of dragonfly is found only around the Norfolk Broads, but it is also found in other parts of Europe and North Africa. In Norfolk, it prefers to live close to waterways where the water soldier plant - Stratiotes aloides grows. Its name Aeshna isosceles relates to a distinctive triangular marking on its abdomen.

Species detail

  • Aeshna isosceles
    Taxonomy

    Find out how Aeshna isosceles, the Norfolk hawker dragonfly, can be distinguished from its close relative Aeshna grandis, the brown hawker.

  • aeshna isosceles
    Distribution

    This dragonfly is found throughout central and southern Europe but only in localised areas in northern Europe - in Britain it is restricted to Norfolk. It has also been found in North Africa.

  • Aeshna isosceles
    Biology

    The Norfolk hawker prefers waters where the water soldier Stratiotes aloides grows. Find out where.

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    Conservation

    In Britain, the Norfolk hawker is only found in nature reserves in Suffolk and Norfolk, where its habitat is being maintained.

Images

Aeshna isosceles the Norfolk Hawker dragonfly.

Aeshna isosceles the Norfolk Hawker dragonfly.

© R Norton & D Allen
Aeshna isosceles

 Aeshna isosceles Norfolk Hawker, Strumshaw Fen RSPB reserve.

©  K Goodger
Aeshna isosceles

Aeshna isosceles Norfolk Hawker, Strumshaw Fen RSPB reserve.

©  K Goodger
aeshna-isosceles

Aeshna isosceles the Norfolk Hawker dragonfly.

© R Jurecek
Author

David Goodger

Curator, Department of Entomology.

A word from the author

'This is a very beautiful insect and well worth making the effort to see'

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Glossary

Eutrophication is an increase in the nutrient content of a body of water.