Abstract
Since 2005 a breeding pair of A. pomarina has been observed near the village of Drienovec, Košice-Environs district, eastern Slovakia. Since 2009 occupied nests have been found each year with the subject pair. In the years 2009, 2010, 2011 and 2013 this pair successfully reared one young A. pomarina, but in 2012 they reared two B. buteo young during the nesting period in natural conditions and without the intervention of human beings. This is the first such documented case in the entire breeding grounds ofA. pomarina.