Fig. 1
From: Daily rhythms in food intake and locomotor activity in a colony of domestic cats
Actograms of four cats: two bimodal ones (left) and two unimodal ones (right). Actograms show the data (here, activity through the covered distance per time) for 2 days per line, with successive days appearing on successive lines (cf [30]). On the left side of each actogram, blue areas represent night time, white areas day time