When hunting, this creature moves slowly and silently through the forest ferns. When it senses prey, its muscular neck cocks back into a striking position, then snaps forward. Its long, pointed head detaches and flies toward the prey as a self-guiding venomous projectile. After the head embeds itself into its target (often a hexapede), the dart emits a series of high-pitched squeals. The signals allow the body (now sightless) to home in and locate and move toward the detached part. Still separated, the strange partners enjoy their prey. Sated, the neck bends down and a mesh of hairlike tendrils rejoins head
with body. (Read more)
This would all be academically intriguing were it not for the fact that slingers have proven deadly to human colonists. Several have died-- badly-- after being struck by a slinger dart.
Na'vi hunters have been known to retrieve a dart that has been orphaned from its mother/body to use later as an effective weapon.