Why does finding an insect scuttling far from natural water indicate it is not a Giant Water Bug?

Answer

They cannot survive for long away from water

A fundamental difference between the true aquatic insect and the commonly mistaken terrestrial pests lies in their environmental dependence. Giant Water Bugs are aquatic creatures whose life support systems—breathing, feeding, and reproduction—are tied to the water. If an insect is found indoors, such as crawling across a basement floor far removed from any natural water source, it cannot sustain itself. This contrasts sharply with cockroaches, which thrive in the dark, humid conditions found in plumbing areas, sewers, and basements.

Why does finding an insect scuttling far from natural water indicate it is not a Giant Water Bug?
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