Active feeders

Among lemures, active feeders are a category of spirits that hunt and feed on the ectoplasm of their still living peers; cases in which the hunting of a healthy active feeder, even when successful, results in the death of the prey are quite rare. 

One of the most visible evolutionary adaptations of an active feeder are the large, sharp canines, developed to sink into prey and easily penetrate the protective layers that separate them from the precious food. In doing so, they minimize their own effort and the damage suffered by the prey. Because of this feeding habit, active feeders are also sometimes called "vampire spirits".

Active feeders are capable of producing a small amount of lysergic acid that permeates their saliva when they are ready to feed, a substance they use to make their bite pleasant for the victim. In doing so, they ensure that they do not have a violent response from the prey; on the contrary, it is not uncommon for the victims of active feeders to survive the encounters with a positive memory of the experience, and even return to the predators that targeted them to be bitten again. 

This hunting strategy is obviously associated with numerous advantages: it gives the lemures that practice it the possibility of obtaining ectoplasm that is always very fresh, and therefore more nutritious, that of avoiding deadly clashes with their targets, and of being able to obtain high-quality food by feeding multiple times from the same prey.