@misc{Gromadzki_Maciej_Breeding_1970, author={Gromadzki, Maciej}, editor={Polish Academy of Sciences, Institute of Ecology}, copyright={Creative Commons Attribution BY 3.0 PL license}, address={Warszawa}, howpublished={online}, year={1970}, language={eng}, abstract={In mid-field afforested areas 44 bird species were found to nest. 18 of these species appeared to be typical to this habitat, representing 60-90% of the total number of birds of a community. Although in small afforested areas fewer species nest than in the large ones, the total population density there is higher. Species that feed in fields are more abundant in small afforested areas than in large ones. Their breeding territories are small. Only a slight relationship is seen between the size of an afforested area and the population density of those species which feed in it. The breeding territories of this group of birds are large, spreading along the afforested areas.}, type={Text}, title={Breeding communities of birds in mid-field afforested areas}, URL={http://rcin.org.pl/Content/71170/PDF/WA058_86331_P2840-T18_Eko-Pol-A-Nr-14.pdf}, volume={18}, number={14}, journal={Ekologia Polska}, publisher={Państwowe Wydawnictwo Naukowe}, keywords={birds, breeding birds, ecology, breeding biology, Poland, Kościan (region), Aves}, }