Abstract
Bird flocks present a greater threat to aircrafts than individual birds. Observations carried out from 1 September 2007 to 31 August 2009 in the area of Dęblin Military Airfield were
aimed at assessing the possibilities of using a falconer for the purpose of managing the maximum flock size of 5 selected bird species (European Starling, Jackdaw, Rook, Lapwing and Domestic Pigeon) present there. No significant changes in the maximum flock size of the studied birds were found between the control period and the time of his work at the airfield. Observation of long-term trends in the change of flock size indicates that for two of the studied species (Jackdaw and Domestic Pigeon) the maximum flock size decreased during the time of the falconer's work at the airfield. In the spring and summer periods, birds were more prone to the effects of falconer activity than in the fall and winter periods.
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