FIGURE 3.

Relationships between different climate variables and the hunting elevation (m a.s.l.) of the four species collected over a 30‐year period (1991–2020) during the yearly hunting period in autumn in Grisons. Both hunting elevation and climate variables were detrended by yearly differencing. Effect of differences in (a) annual fresh snow depth (cm) and (b) number of frost days in October and November on relative elevation of rock ptarmigan, (c) mean annual ambient temperature (°C), (d) number of frost days in October and November on elevation in Alpine mountain hare, (e) annual fresh snow depth (cm), (f) the interaction of annual number of frost days and annual snow depth (cm) on elevation in black grouse and (g) number of frost days in October and November on elevation in European hare. The lines represent the regression lines (statistically significant) with the red/blue area showing the confidence intervals. Modelled on annual means of the data