Figure 2.

Relationships between maximum snow depth and the species richness of wintering forest bird species (a) all species, (b) residents, (c) short‐distance migrants, (d) long‐distance migrants. Dots indicate data derived at each site; lines reflect the estimates of the best spatial models (solid lines indicate semi‐partial R ² of either the temperature and its squared term >0.1, and broken lines indicate that of both the temperature and its squared term <0.1). We used a GLMM (a multivariate analysis), and the effects of the other explanatory variables were considered and fixed to mean values in each figure. See details of the best spatial models in Table 1. Abbreviations: LD, long distance; Resid, residents; SD, short distance