EN
In 2015, we noted two cases of the Montagu’s Harrier Cirrus pygargus nesting very close (20m and 23m) to farm buildings in the agricultural landscape of the Mazovian Lowland. In the locality Olszewo-Grzymki, a nest was found containing a small nestling and four eggs, which was located in a 1-ha triticale crop field at a distance of 23 m from the nearest farm building. On the next visit, the nest was already abandoned. The second case took place near the locality Ukazy. The nest was placed in a triticale crop field at a distance of 20 m from the farm fence. The pair raised one chick. In the Mazovian Lowland at the end of the 1990s nests were located 150-200 m from farms, but during the recent 10-years the nests have been frequently discovered at a distance of 70-150 m.