Behaviour of Montagu’s Harrier juveniles during the post-fledging dependency period in southeast Poland. - I. Kitowski. - Berkut. 11 (2). 2002. - P. 201-207.
The dependency period of 51 fledglings Montagu’s Harrier (Circus pygargus) was studied on calcareous peat-bogs near Chelm (SE Poland). The juveniles fledged on average 33,6 days after hatching, and continued to depend on their parents for 17–31 days (M = 23,6 ± 3,6 days, n = 42). A progression was observed in the flight behaviour ability of the fledglings: the total time spend flying each day increased throughout this period, as well as the use of energy saving flight types. With progressing dependency period the rate of successfully aerial prey transfers increased. The mortality rate during the dependency period was 17,6 % (n = 51). [English].
Key words: Montagu’s Harrier, Circus pygargus, Poland, behaviour, post-fledging dependency period, flight development.
Address: I. Kitowski, Department of Nature Conservation, Maria Curie-Sklodowska University Akademicka 19, 20-033 Lublin, Poland; e-mail: