Ornithologists of reserves summed up the results of autumn flights of birds

During the autumn period research associates of reserves and national parks make seasonal observations over migratory birds. Help in such work to them quite often is rendered by volunteers. In the Sochi national park (Krasnodar Territory) as a result of field works on Aibga Ridge the ornithologist Tilba Petr collected many interesting data. It managed to record mass flight of birds of prey, especially black kites. In some packs was to 200 individuals. Birds entered an ascending stream, rose meters on 500 in height, overcame Aibga Ridge and flied strictly on the South. Not so...