“	To those who listen carefully, the perspicacious loris can be quite helpful.	”
–Dr. Nora Barlow, Behemoth

A perspicacious loris is a small, monkey-like creature created by Dr. Barlow. Most of its "life-threads" probably come from the natural types of lorises. Zaven tells Alek and Deryn that "perspicacious" means "shrewd or clever." These creatures bond with the person who is present at their hatching, and are able to give that person advice by pointing out important parts of conversations and faulty reasoning. When a loris is learning a new word, it says it loud and clear.

In the seriesEdit

Dr. Barlow made several eggs of these creatures, but most of them were destroyed when the Leviathan crashed in the Alps and the rest were damaged. These eggs were the secret cargo that Dr. Barlow was transporting to the Ottoman Empire; one of the eggs was to be a gift for the Sultan to prevent the Ottomans from going to war with Britain over Churchill's seizing of the Osman for British purposes, but the egg was crushed. Dr. Barlow has her own loris, and Alek has Bovril. Bovril helps Alek solve the mystery of Deryn being a girl.