Figure 1.

Description of the ibex data set. (a) Location of the eight main ibex colonies in the eastern Swiss Alps. (b) An old male ibex in its typical Alpine environment with distinct annual horn growth increments (Photo: J. Senn; WSL). (c) Cumulative elevational distribution of ibex hunting locations (Figure S2) including the mean hunting elevation per colony that ranges from 2222 m asl in colony 6 to 2630 m asl in colony 1 (number in parenthesis refers to the number of hunted animals per colony). (d) Distribution of 42 239 annual horn increments from 8043 individual ibex indicates that the majority of animals have 3–5 growth rings, and thus were 4–6 years old when hunted.