Summary In 2010, a new site of the Praying Mantis Mantis religiosa L was found between Chmielnik and Holendry (UTM: DB70, 50°60’N, 20°70’E). This site is located on an open sandy area surrounded by a pine monoculture and a mixed forest. This is the westernmost site of this species in Poland. The potential threat to mantises in this area is afforestation. Another site was found in 2011 in the region of the village of Antonowka in Mazovia (UTM: EB49, 51°25’N, 21°34’E).