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Our aim was to determine dynamics in a population of tawny owls Strix aluco over 15-year period, in relation to year-to-year variation in environmental conditions. The research was carried out in a habitat mosaic of fields and forest in central Poland, over the 2004–2018 period. Numbers of pairs (territories) were established by the standard playback survey technique supplemented by searches for nest...
An increasing urbanization of habitats in which birds live influences their populations by modifying behaviour, dietary composition, causes of mortality and variables related to breeding. This study aimed to compare breeding periods and productivity among tawny owls, Strix aluco, inhabiting either an urban or an extra-urban area. Studies were conducted in parallel in two locations: central zone of...
Data on sex structure and growth of the population is crucial for proper game management. Camera traps, which are of reasonably low cost, but very efficient, can potentially measure the aforementioned parameters. The paper objectives was to assess the share of bucks, does and calves in red deer Cervus elaphus population in the area of the Białowieża Forest. Two methods were used: camera traps and...
Abundance of red fox (Vulpes vulpes) populations in Poland and Europe have increased in the past decades, especially in the areas of high anthropogenic transformation. The aim of this study was to assess the current density of red fox in natural forests and to analyse changes in its abundance since 1981. The fieldwork was carried out in Polish part of the Bialowieża Primeval Forest (BPF), including...
On June 16, 2016, a nightjar was recorded in the south-eastern part of Warsaw. One individual called spontaneously in compartment 4 of the Sobieski Forest,. This was a dune supporting pine forest Pinus sylvestris, with an admixture of silver birch Betula verrucosa and common juniper Juniperus communis. Based on the time and place of the observation, one can assume that this was a breeding species...
The analysed pellet material was collected in the years 2014-2015 in the forest complex Prusy, a part of Rogów Forest District. Diet of owls was dominated by voles Microtus spp., accounting for 76% of prey items. The contribution of Muridae was 13% and the total contribution of rodents was close to 90%. Common shrews, birds and insects supplemented the diet.
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