Fig. 4.

Behavioural time allocation in female muskoxen in northeast Greenland depending on a day of the year, aggregated by month, b time of day during different light seasons (polar night = period of 24 h of darkness, midnight sun = period of 24 h daylight), c year and d landcover type (bare ground, sparse or dense vegetation). Note that in c year t denotes the winter season t-1 to t, i.e. for instance 2014 is the winter 2013–2014. For behavioural time allocation by Julian day, i.e. not aggregated by month, see Additional file 1: Fig. S11 D