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Banded Demoiselle

Male Banded Demoiselle ©Mark Hamblin/2020VISION

Banded Demoiselle

Female Banded Demoiselle ©Margaret Holland

Banded demoiselle

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Enw gwyddonol: Calopteryx splendens
The Banded demoiselle can be seen flitting around slow-moving rivers, ponds and lakes. The males are metallic blue, with a distinctive dark band across their wings, and the females are a shiny green.

Top facts

Stats

Length: 4.5cm

Conservation status

Common.

Pryd i'w gweld

May to August

Ynghylch

The Banded demoiselle is a large damselfly that lives along the edges of slow-flowing rivers and canals, still ponds and lakes, and among lush, damp vegetation. Its common name is derived from the distinctive 'fingerprint' mark on the males' wings. The only other damselfly with coloured wings is the similar-looking Beautiful demoiselle; however, this species lives on smaller, fast-flowing rivers, mainly in the west of the country. Banded Demoiselle males are very territorial, performing fluttering display flights to win over females. They are on the wing from May to August.

What to look for

Male Banded demoiselles are metallic blue, with broad, dark blue patches on each wing; females are metallic green with pale greenish wings. Of the UK's damselflies, only the Banded demoiselle and similar Beautiful demoiselle have coloured wings; the latter differs by displaying almost entirely dark, metallic wings. At rest, damselflies hold their wings along the length of their abdomen.

Where to find

Found in England, Wales and Northern Ireland.

Habitats

Roeddech chi yn gwybod?

Female banded demoiselles lay their eggs by injecting them into plant stems under the surface of the water. The eggs take about two weeks to hatch and the larvae take two years to develop, overwintering in the mud at the bottom of the river or pond.