Abstract
Roost sites play a very important role in magpie’s life cycle. Frightening birds away may have disadvantageous influence on its population. There have been conducted researches concerning changes in roosting birds number for intense use of fireworks on New Year’s Eve. The researches took place on magpies’ roosting sites in Zielona Góra, W Poland. The results suggest there should be ban on using fireworks or there should be marked certain town areas (after consulting with ornithologists) where fireworks could be used.
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