Cockroaches are mostly active at night, but they may be seen during daylight when the infestation is very high and harborage areas are overcrowded. Cockroaches will also emerge during daytime when exposed to pesticides or lack of food and water.
Cockroaches are not social insects like termites and ants. They share the same space and food sources, but they forage for food individually. Cockroaches form aggregates of individuals, but each member is on his or her own. And when food is limited, they become cannibalistic and start eating each other.