Leuchorrhinia dubia - White-faced Darter
Male
Close-up of "face"
Female
Pair in copulation wheel
Exuvia (male, top view)
Description
Length: 33-37mm
The White-faced Darter is a small dark dragonfly, with a pale creamy white frons.
The wings have small black patches at the base and dark brown pterostigma.
The male has a narrow black abdomen, marked with red and orange on the dorsal and lateral segments.
The thorax is black with faint red antehumeral stripes and lateral markings.
The female is patterned like the male but yellow replaces the red markings.
More detail
Habitat
The White Faced Darter is a species of lowland peatbogs.
It requires relatively deep, oligotrophic, acidic bog pools with considerable rafts of Sphagnum at the edges in which to breed.
Larvae also occur among waterlogged Sphagnum in depressions devoid of standing water.
The larvae live within the matrix of submerged and floating sphagnum and are confined to waters without fish.
Away from its aquatic habitat it also requires scrub or woodland, which provides important roosting and feeding sites.
More detail
Status and Distribution
In Britain the White-faced Darter is a rare dragonfly having declined, notably in England, in the last 35 years.
It is afforded protection under the Wildlife and Countryside Act, 1981 and is the subject of Biodiversity Action Plans in Cheshire and Cumbria.
More detail
In Britain the White-faced Darter is found at isolated sites from the Midlands to north Scotland and Chartley Moss is currently the most southerly distribution in the UK.
Major strongholds for the species occur in the highlands of Scotland.
The populations in both Inverness-shire and Ross-shire are particularly important.
More detail
Distribution map from the National Biodiversity Network Gateway (opens in new window).
Similar species
The White-faced Darter can be confused with the Black Darter.
However, the flight periods of these two species usually only overlap for a very short period, making identification easier, but specimens should be examined in the hand to confirm a positive identification.
Flight Season
The White-faced Darter usually begins to emerge in the middle of May and can be seen on the wing until the end of July or early August.
Threats
The main threats to this species come from habitat destruction and fragmentation, removal of Sphagnum Moss, Succession, changes in site hydrology, pollution and eutrophication, predation, climate change, and the impact of people visiting inhabited sites.
More detail
Management
General management principles include maintenance of the lowland peatland habitat, control of scrub encroachment, and maintenance of both the water quality and quantity.
Best practice guidelines have also been suggested for management of inhabited sites, focusing on the control of scrub and management of the aquatic vegetation within bog pools.
Habitat creation and restoration should be considered as an option where possible.
More detail
Management Fact File last updated 27/09/02 See the whole Management Fact File