We could find infinite examples, but this should give a basic idea of the way organisms subdivide a community.
Diurnal animals tend to be most active in morning and evening.
Nocturnal animals are more active just after dark and just before dawn. Animals are also creatures of habit. A flock of quail will usually be found doing the same thing in the same area at the same time each day. Plants also show activity periodicity. Obviously they photosynthesize in daylight, but usually with a distinct peak in the morning.