This in fact a really big problem for the complete food chain. In Germany, some regions lost more than 90% of their "small" birds because of the extensive mono

This in fact a really big problem for the complete food chain. In Germany, some regions lost more than 90% of their "small" birds because of the extensive monoculture. As soon as the crops could provide food for the birds, they are harvested. Ironically, it means that rural areas are like deserts for birds and they can only survive in cities!