Ground Beetles of Ireland

Badister collaris

Click on the image to enlarge it in a new window
Badister collaris
© Roy Anderson
Badister collaris
Click on map to enlarge it in a new window
(Maps updated 30th November 2009)

Badister collaris Motschulsky, 1845

Description: A small (4-5mm) brown-black Badister living in luxuriant vegetation, litter etc at the margins of rich lakes and fens. Very uncommon. Part of a complex of difficult species. Requires dissection to distinguish from B. peltatus.

World Distribution: A European temperate species (73) found from southern Scandinavia to the Iberian Peninsula and east into Asia Minor.

Irish Status: Added to the Irish List by Owen (1994) from Lough Gash, Clare. Since found at Knockaderry Reservoir, Ballyshunnock Reservoir and Ballyscanlan Lough in Co. Waterford where it appears common (Anderson & McCormack, 2009). Also from a marsh at Barrigone, Co. Limerick (pers. comm., Alan Brown). Restricted to the extreme south-east of England within Britain (Luff, 1998) but apparently more widespread in Ireland.

Ecology: At Lough Gash the species occurred under an algal mat on the open shoreline of a turlough. In other parts of its range it can occur with B. peltatus which in Ireland occupies silty and richly vegetated, often wooded, shores of lakes and turloughs on limestone.