What observation is a strong indicator of an active cockroach colony?

Answer

Spotting a live cockroach during the day

Cockroaches are inherently nocturnal creatures that prefer to hide in dark, secluded spaces. Spotting one during daylight hours is highly unusual and suggests that the population has become so large that overcrowding has forced individuals out of their hiding spots. This behavior is a clear sign that a significant colony is likely present and that the insects have exhausted their preferred, safe environments, necessitating a more aggressive approach to population control.

What observation is a strong indicator of an active cockroach colony?
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