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Family Gerridae are physically characterized by having hydrofuge hairpiles, retractable preapical claws, and elongated legs and body. Water striders have two antennae with four segments on each. Antennae segments are numbered from closest to the head to farthest. The antennae have short, stiff bristles in segment III. Relative lengths of the antennae segments can help identify unique species within the family Gerridae, but in general segment I is longer and stockier than the remaining three. The four segments combined are usually no longer than the length of the water strider head.
Floating over water,