Sentence:  Nonetheless, some <WSD>insect</WSD> prey take advantage of clutter by hiding in it. Earless ghost swift moths become “invisible” to echolocating bats by forming mating clusters close (less than half a meter) above vegetation and effectively blending into the clutter of echoes that the bat receives from the leaves and stems around them. 
Meaning of the word marked with <WSD> tags:  An arthropod in the class Insecta, characterized by six legs, up to four wings, and a chitinous exoskeleton.