Agricultural intensification at local and landscape scales impairs farmland birds, but not skylarks (Alauda arvensis)

Agricultural intensification constrains the occurrences of birds from local through landscape to regional scales. Here, we tested effects of landscape configuration (comparing regions with small vs. large field size, thereby contrasting former West and East Germany), local farming practice (organic vs. conventional) and within-field position (edge vs. centre) on the abundance and species richness of farmland birds in winter wheat fields, with...