While Rareth could have fired sooner, she had taken those few extra moments to try and assess how much of a threat the creature really was. Still, she could not entirely fault the agent for firing. Everything about its body language and movement did suggest aggressive intent. It was strange that it would try to attack such a large group, but then again, as a flying creature, perhaps it just hoped to pick one of them off. 

In any case, it was not the flyer that was revealed to be the greatest source of worry. The trees around them, it seemed, were more than just stationary plants. In retrospect, Rareth perhaps should have been suspicious of them. Bioluminescence could be used to lure or dazzle prey. Though, she was not sure if the trees were predatory, exactly. The tree had not consumed the flyer, but rather attacked and tossed it away. It may have been more of a defense mechanism, in which case the lights were probably warnings. 

“Move carefully and keep away from the trees.” Rareth said calmly. She was glad they had taken the less dense pathway. “We do not know what will set them off, so just try not to agitate them.”