first egg laying date - Avian Conservation and Ecology

Effects of spring weather on laying dates, clutch size, and nest survival of ground-nesting passerines in abandoned fields PDF

Alexander Grabovsky, Dmitry Shitikov, Elena Galkina, Stanislav Samsonov, Svetlana Fedotova, Tatiana Makarova, Tatiana Vaytina, Viktoria Grudinskaya