Name comes from Sam Kelley's having initially mistaken it for a vulture, and upon seeing it more clearly dubbed it Vultursaurus.
Vultursaurus is a strange, flying non-avian dinosaur from the chasms and jungles of Skull Island. Despite appearances, they are not pterosaurs. In fact they are the sole surviving representatives of a remarkable second dynasty of airborne theropods that have developed bat-like wing membranes instead of feathered wings. Their wings (which are not single sheets of skin as on pterosaurs) are divided by extended fingers. Broad and supple so that they can be realigned with ease and supple, their wings are able to be realigned with ease in flight. Their flapping is not as efficient as either a bird’s or bat’s but is more than sufficient to keep them aloft. Their wings are better suited to allow it to swim rather than fly.
Vultursaurus is described as having a fearsome looking "U-shaped" head with large eyes and eardrums, as well as needle-toothed jaws ending in a small beak, a sleek body, short tail and powerful, hind legs with an opposable toe claws. Its claws are incredibly sharp and are capable of tearing flesh on contact. However, due to their slight build, they cannot carry much weight with their feet. These flocking creatures are nocturnal, roosting on ledges or in deep jungle shade during the day, emerging in vast flocks to hunt insects, such as moths, at night. They have excellent night vision. They have reflective eyes that are able to discern distance and depth even in dim starlight. Only on the blackest nights are they grounded. They are heavily preyed upon by other ravine-dwelling species - a single Deplector can eat several dozen a night.
- Vultursaurus, like many other Skull Island creatures has an entry in book 'The World of Kong: A Natural History of Skull Island" detailing its origin and biology.
- Two vastly different images of Vultursaurus exist. One from "King Kong: The Island of the Skull" and one from "The World of Kong: A Natural History of Skull Island". This is due to The Island of the Skull's cover art being published before the complete description and dimensions of the Vultursaurus had been made available. The design shown on the cover of "Island of the Skull" was reused for the flying lizard Aliepesaurus in the World of Kong.
- Vultursaurus resembles the real-life bat-winged dinosaur Yi qi, which was discovered 10 years after World of Kong was published.