Two new sites of rare snail species were found on the northern edge of Poznań. Vertigo moulinsiana (Dupuy) and Vallonia enniensis (Gredler) occurred on the northern, marshy shore of a pond, Vertigo angustior Jeffreys was found on its southern, moderately moist shore. Counting of V. moulinsiana on plants in January 2016 showed that 92.8% of wintering specimens were adult and occurred in higher numbers within drooping tussocks of sedges than on single sedge blades. The greatest number of individuals was found attached to the underside of a leaf of Alliaria petiolata.
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