Hands of ornithologist scientist measuring length of bird’s wing with ruler. Eurasian blue tit. Biological station for banding of birds and studying its migration. Cyanistes caeruleus, Paridae
Hands of ornithologist scientist measuring length of bird’s wing with ruler. Eurasian blue tit. Biological station for banding of birds and studying its migration. Cyanistes caeruleus, Paridae