Sentence:  The Bat—they called him the Bat. Like a <WSD>bat</WSD> he chose the night hours for his work of rapine; like a <WSD>bat</WSD> he struck and vanished, pouncingly, noiselessly; like a <WSD>bat</WSD> he never showed himself to the face of the day. 
Meaning of the word marked with <WSD> tags:  Any of the small, nocturnal, flying mammals of the order Chiroptera, which navigate by means of echolocation.