If you check the bg thread, players reported seeing them right before you enter the Wildskeeper Revie (Yumcax). The message is a cryptic warning not to clipper through the zone. http://www.bluegartr.com/threads/115735-Naakual-Notes-Strategies-confirmed-drops/page30
I also see one in Upper Jeuno sometimes after I hop out of my mog house. I like to think it loves me so much that it says "Please...t-take me with you"