Description

Species protected under the Wildlife and Countryside Act.

The Norfolk Hawker is one of two brown hawker dragonflies found in Britain.

Males and females look similar and have a yellow triangular mark near the top of the abdomen.

 

 

 

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Where to See

Latin NameAnaciaeschna isoceles
Habitat

The optimum conditions for breeding appear to be unspoilt grazing marsh dyke systems with clean, non-saline water, rushy margins, preferably with an abundance of water soldier as well as other aquatic plants.

Threats
  • Conversion of grazing marsh to arable farming.
  • Inappropriate ditch management.
  • Nutrients enrichment.
  • Pollution.
  • The impact of global climate change and fluctuations in water levels.
Status & Distribution

The Norfolk Hawker is currently restricted to the fens and grazing marshes that are relatively isolated from polluted water in the Broadlands of Norfolk and Northeast Suffolk. A Local Biodiversity Action Plan (LBAP) for the Norfolk Hawker has been drafted for Norfolk.

Similar Species

Brown Hawker

  • Brown wings.
  • Blue-brown eyes.
  • Blue and yellow markings.
Management

Norfolk Hawker Management Profile

General management principles include maintaining grazing marshes, controlling saline intrusion, controlling nutrient enrichment. There are also best practice guidelines for managing inhabited sites, particularly the dyke vegetation and the surrounding terrestrial habitats.

Case Study

Work is underway to restore habitats for this species in Norfolk.

Species GroupDragonflies
Identification Notes
  • Length: 67mm
  • Green eyes.
  • Brown body.
  • Yellow triangular mark near the top of abdomen.
  • Males: wasted abdomen
  • Females: bulkier abdomen with no waist.
Flight PeriodNorfolk Hawker
Larval Information

Hawkers have a long streamlined body-shape.

38-44mm

Mask length roughly 3x the width.

Cerci are 2/3rds length of the paraprocts at the end of the abdomen.

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