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Male
Length 74mm, wings 100mm.
Predominantley black species, with yellow thoracic stripes and antehumeral stripes on the thorax, with yellow rings around the abdomen, slightly swollen towards the tip. Green eyes. Female Southern Hawkers sometimes confused with this species.
Female
Length 84mm, wings 100mm.
Predominantley black species, with yellow thoracic stripes and antehumeral stripes on the thorax, with yellow rings around the parallel sided abdomen, ovipositor extending beyond segment 10. Green eyes. Female Southern Hawkers sometimes confused with this species.
Both
Black with yellow markings, as rings on abdomen; eyes greenish; legs black; female has sharp ovipositor; wings clear with leading edges (costa) yellow.
Habitat
Streams and rivers with silt, gravel or stone base in upland areas or lowland heath.
Behavior
Eggs laid in bed of stream, etc. Larvae 2-5 years.