Fig. 2.

Histogram of the number of individuals (coloured by sex) as a function of the number of pictures. The bin size represents 20 pictures. Marginal boxplots at the top display the minimum (e.g. 1 picture in females and males), first quartile (e.g. 39 pictures in females and 22 in males), median (e.g. 63 pictures in females and 50 in males), third quartile (e.g. 112 pictures in females and 79 pictures in males), and maximum (e.g. 488 in females and 388 in males) pictures for females (purple) and males (green).