"Zwariowane" głuszce?

The capercaillie Tetrao urogallus is a species whose numbers and distribution have been declining for more than 100 years. The average escape distance capercaillie amount to about 30 to 150 metres. However, some birds do not escape but, on the contrary, come closer towards people. The cases of tame and fearless behaviour of capercaillie have been occurring more frequently lately. The hens look for man's company and appear in human settlements, whereas cocks show aggression and attack people, animals or vehicles. The aggression of cocks accompanies the disturbed lekking behaviour. The aggressive cocks were found throughout the all year, yet most frequently during lekking. The fearless behaviour of hen occurs only in spring and recurs in the subsequent years. Disturbances in the behaviour of capercaillies have a physiological basis and are not the manifestation of a synanthropisation of the species. The fearless and aggressive capercaillies constitute about 1% of the population within the range of their distribution. They live in small isolated populations mainly in Central Europe.