EN
Presence of four owl species was confirmed in the area of Forest Experimental Station of WULS−SGGW in Rogów (central Poland) at the beginning of the 2000s. These were tawny owl, long−eared owl, little owl and barn owl. In the second half of the XX century migratory short−eared owls had also been recorded. Density of tawny owl territories per total area was 2.6/10 km2. For long−eared owl it was lower (1.5/10 km2). Little owls and barn owls were very rare and both species have probably decreased severely in the last several years. Despite fluctuations in the abundance of forest rodents, number of tawny owl pairs was reasonably stable throughout study time. In the case of long−eared owl its numbers varied between years.