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Species Information:
Length: 31mm (Adult), 14-15 (Larvae)
Flight Period: June to July (occasionally May and August)
Both sexes have bright green undersides to the eyes and face and a coenagrion spur. Antennae with 6 segments and prominent spotting on the head. Caudal lamellae long and narrow with distinct, dark nodal constriction and dark nodal line.
Male: segment 2 has a rather variable, spear-head shaped spot linked rather like the cards ♠ "Spades" symbol. Segment 8 and segment 9 are blue except for 2 small black spots on S9.
Female: clear green from the side but mostly black from above.
Habitat:
This species is restricted in the UK to sedge-fringed lochans in the Scottish Highlands.
Status & Distribution:
Rare and local. This is a Red Data Book species.
Similar Species:
This species is easily confused with the other members of the genus Coenagrion and with the Common Blue Damselfly (Enallagma cyathigerum). Look at S2 (on the males) for distinguishing characters. Northern Damselfly is a weak flyer and has a very restricted range. The females can be particularly tricky to distinguish apart.
