Ground Beetles of Ireland

Pterostichus adstrictus

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Pterostichus adstrictus
© Roy Anderson
Pterostichus adstrictus
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(Maps updated 30th November 2009)

Pterostichus adstrictus Eschscholtz, 1823

Description: 10-13mm long black ground beetle with faint bronze hue. Predatory. Lives on open grassland and moorland at moderate to high altitude. Local, but widespread in the north and west.

World Distribution: A 'Boreo-British' species in Europe and restricted to the north and west of the British Isles and Fennoscandia. It is classified as circumpolar Boreo-arctic Montane (26), and widespread in northern Siberia east to Kamchatka and into northern parts of North America.

Irish Status: Widespread and locally common on high ground, but local in more southern counties and not recorded from Kerry.

Ecology: A cold-preferent species, rarely recorded below the 350m contour. Mostly reported from wet upland heath and blanket peat in mountains. Very similar in appearance to P. oblongopunctatus but the latter is a species of lowland woods. There is some overlap in preferences, however, and both species have been collected in a scrub wood/montane heath interface at Glendun, Antrim.