An unusual emergence site for Aeshna cyanea (Müll.) (Anisoptera: Aeshnidae)

December 3, 1993, an exuviae of A. cyanea (2) was found in a dry corridor surrounding the moat of a 19th century fort in Poznan (western Poland). It was sitting on a brick wall, at a height of 1.7 m, 15 m from the entrance. The bottom of the moat (6 m deep, mostly shaded by trees) is partially flooded by 0.1-0.5 m deep, stagnant water, which in dry weather is restricted to the deepest points. The vegetation is represented by grasses, Carex sp., Solanum dulcamara and Berula erecta. In this habitat dwell occasionally larvae of the shade-loving A. cyanea, a species, associated often with similar, small forest-pools (H. HEIDEMANN & R. SEIDENBUSCH, 1993, Die Lihellenlarven Deutschlands und Frankreichs, Bauer, Keltem).