Natura Croatica Issue number: Natura Croatica, Vol. 12 No.4

Značajan porast brojnosti parova na gniježđenju populacije vrste siva čaplja (Ardea cinerea) u dolini rijeke Krapine (sjeverozapadna Hrvatska)

Authors: Zdravko Dolenec

Authors and affiliation

  • Zdravko Dolenec Department of Biology, Faculty of Science, University of Zagreb, Rooseveltov trg 6, 10 000 Zagreb, Croatia

Abstract

Population growth of the grey heron in the River Krapina valley from 1992 until 2002 was followed. This area is a part of the village Mokrice (46°00’N, 15°55’E; Hrvatsko Zagorje region). While only 1 pair of grey herons nested in 1992, the number of nestings pairs gradually rose to 54 in 2002 (Pearson’s correlation coefficient: 0.98; p<0.001; n=11).

Keywords

grey heron, nesting pairs, River Krapina valley, NW Croatia