Extremely northern records of Sympetrum depressiusculum (Sel.) in Poland (Anisoptera: Libellulidae)

Many thermophilous dragonfly species of southern provenance have the borders of their ranges within Poland. S. depressiusculum (R. BERNARD et ah, 2002, Nat. Conserv. 59: 53-71; K.-D.B. DIJKSTRA, 2006, Field guide to the dragonflies of Britain and Europe, British Wildlife Publishing, Gillingham) is one of them. The precise course of its range in northeastern Europe is not known therefore data from Poland are crucial for its establishing. Below three localities from northern Poland are given (Fig. 1): (1) Nature reserve “Bielawa” ad Ostrowo (54°47’32,6”N, 18°14’17,1”E), small pool near the edge of high peat bog, on sand, with a thin layer of tyrfopel. In the vicinity of the pool there are low beds of Carex sp. and Eriophorum sp., farther, moorland and stunted Pinus silvestris L., 1 l-VIII-2006, 13 feeding in vegetation growing by the edges of the pool. (2) Grotowo (54°18’22,3”N, 20°19’13,9”E), the complex of intensively used fish ponds. Bottom of silt covered with tree leaves, water yellowish and turbid, the belt of swamp vegetation discontinuous, with the dominance of Phragmites australis (Cav.)Trin. ex Steud. and Glycerin sp., behind the belt, not very numerous Lemna sp. and Potamogeton spp., 10-VIII-2007, highly numerous population (at least a few hundred imagines), many territorial 3 3, numerous tandems and egg-laying. (3) Chmielnik ad Kgtrzyn (54o07’12,6”N, 2°I2'I3,2”E), a neglected fish pond. Bottom of silt, water green and turbid. Swamp of Typha latifolia L. with the addition of Lemna sp., the centre opened with the mats of green algae. By the shore Salix and a small meadow and a small domestic field. 1 l-VIII-2007, 13 (juvenile) caught on the meadow 10 m from the shore. Those localities are situated within Koszalin Coastland (No. 1) and the Staropruska Lowland (Nos 2 and 3) J. KONDRACK1, 2000. Gcografia regionalna Polski, PWN, Warszawa).