On the diurnal rhythm of activity of Meriones unguiculatus (Milne-Edwards, 1867).

The diurnal rhythm of activity of Meriones unguiculatus (Milne-Edwards, 1867) is examined under natural and artificial light. The activity of 2 animals in captivity was registered actographically. Meriones unguiculatus seems to be more active during the night than during the day and showsed activity in the forenoon was registered.