This deadly species originates on a planet with three suns, one which has almost eternal light, with only one period of darkness every 22 years. The species is, however, nocturnal, shunning light whenever possible. This is due to their very sensitive gray leathery skin which is easily damaged by light. Even a light source as weak as a flashlight will cause the skin of the nocturnal hammerhead to burn, the moisture boiling in the upper epidermis of the creature's flesh.

Only able to come out once every 22 years when the planets and suns align eclipsing all three suns, this species spends the majority of their lives in the dark caverns just below the planets surface. Here they can rest, curled up clinging to the cave walls.

The basic body structure of these creatures is difficult to make out due to their preference for darkness, but it can be seen that the Nocturnal Hammerhead has a cross, or hammer, shaped head, a body ending in a split tail, a pair of wings, and two limbs which are used both as arms (balancing on its prehensile tail while gently flapping its wings) and as legs (while walking short distances).

The Nocturnal Hammerhead's wings are membranous and are used in flight. Through a combination of flapping, gliding and soaring, this species can cover great distances and are able to easily bare down on prey and seize them.

The infants of this species are smaller versions of the adult Nocturnal Hammerheads, and are the first to emerge during the eclipse, filling the sky as they leave their underground homes in the hundreds.

Though the infants hunt in large packs, the adults of the species prefer to eat alone, saving all of the available food for themselves. They will however, sometimes co-operate in order to bring down difficult prey.

During times of shortage, this species has been known to cannibalise one another. They will turn again each other, fighting tooth and claw on the ground, or will attack one another in mid air battle.

The Nocturnal Hammerheads are fierce carnivores. Their claws can be used to easily rip apart a man and their mouths are lined with large dagger-like sharp teeth.

As well as these common features, the Nocturnal Hammerheads also have a sharp bony crest which comprises the upper section of their heads. In conjunction with their powerful neck muscles, this crest can be used to "head butt" prey, splitting them open and killing them instantly.

As well as killing and eating prey instantly, the Nocturnal Hammerheads will sometimes capture victims alive to be consumed at a later time. They can do this either by using their prehensile split tail or by using tentacles that extend from their palms to capture victims and pull them towards them.