1611 individuals, representing seven bat species, were observed in Kampinos National Park, the 2022/2023 winter season summary stated.
The small records, i.e., the maximum numbers so far, concerned three species: the brown long-eared bat – 5 more individuals than the previous record, the Daubenton’s bat – 11 more individuals and the greater mouse-eared bat – 5 more individuals.
Around 200 wintering sites were prepared for the bats and 600 boxes were installed, which are used by the animals from summer to autumn. A total of 183 earthen cellars from farms purchased by the KPN and a bunker in the complex of buildings of the former Warsaw Pact reserve command post on Luzowa Mountain were adapted as hibernacula or winter lairs.
Bats were also counted in two forts of the Modlin Fortress and a complex of five powder magazines, which are located on the KPN’s territory. However, several hundred earth cellars used by residents of Kampinos villages, where large numbers of bats can also be expected, were not inspected.
Bats are among the most endangered mammals on Earth. They are important regulators of insect abundance. All domestic bat species are subject to species protection in Poland.