Fig. 2. (A) The number of common buzzards (Buteo buteo) observed per nonbreeding bird survey site in December 2000. The larger and darker the circle, the more birds per survey site. (B) The modeled buzzard density distribution, i.e., number of birds per km². The modeled distribution was created using regression-kriging, further described in the methods section (see also Fig. 1 and steps 1–3 in Table 1).