Why is the giant water bug frequently nicknamed a "toe-biter" in common usage?

Answer

Due to its potent defensive sting administered via its rostrum.

The common nickname 'toe-biter' is applied to the giant water bug as a direct consequence of its defensive capabilities. Although these insects are specialized predators, they possess a defensive mechanism that involves deploying their rostrum to inflict a painful sting if they feel threatened or are handled improperly, often encountered when people wade in their habitats. This defensive sting is quite potent, providing a memorable and cautionary experience for anyone whose foot or toe ventures too close to the formidable aquatic hunter.

Why is the giant water bug frequently nicknamed a "toe-biter" in common usage?
water bugdietinsectaquatic