Beetle Or Worm?

A liquid glistened between the segments of its long belly and ripples ran up and down its underside. Hevne directed the tracker to take a step back and they both moved away from the apparently stricken beast.
"Beetle or worm?" muttered the tracker.
Hevne shook her head.
"Nothing that I've ever seen," she whispered.
The prone beast made no attempt to turn over onto its legs, which continued waving slowly in the air.
At that moment the second tracker appeared above them.
"Situation?" Hevne requested.
"Nothing to report," he recounted. "No unidentified tracks. I believe this is the only one."