@misc{Jakubiec_Zbigniew_River_1972,
 author={Jakubiec, Zbigniew},
 editor={Polish Academy of Sciences, Institute of Ecology},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 address={Warszawa},
 howpublished={online},
 year={1972},
 language={eng},
 abstract={The importance of river as a feeding place for Corvus corone cornix L., Corvus frugilegus L., and Corvus monedula L. was studied throughout a year. The relationship between diurnal activity and the importance of river as a food supplying medium during individual seasons of year as well as theinfluence of riverside landscape (towns, open areas, forests) upon the number of birds feeding in individual sections of river were indicated. The problem of food competition between Corvus corone cornix L. and Larus ridibundus L. was also discussed.},
 type={Text},
 title={River as a feeding place for crows (Corvidae)},
 URL={http://rcin.org.pl/Content/72230/PDF/WA058_86536_P2840-T20_Eko-Pol-A-Nr-43.pdf},
 volume={20},
 number={43},
 journal={Ekologia Polska},
 publisher={Państwowe Wydawnictwo Naukowe},
 keywords={Corvidae, behavior, Poland, Odra River},
}