Spore Mantises, also known as Phasmid Sylas, are giant insect kaiju that first appeared in the 2017 MonsterVerse film, Kong: Skull Island.


The name Spore Mantis is likely a reference to the creature's flora-like and insectile physiology.

Their scientific name is Phasmid Sylas. Phasmid is derivative of the Phasmatodea order of insects. Sylas is derived from the Latin word silva, which means "wood" or "forest".



Spore Mantises resemble stick-insects, albeit many times larger and encased within bark-like armor. They have six legs that are also encased in bark, and small heads which can retract into their log-like armor. Notably, they have two fang-like mandibles used for crushing bone.


The roars of Spore Mantises are insect-like and very high pitched despite their size.


Spore Mantises remain camouflaged until their prey is within the right distance to attack. They can also be very aggressive when startled. Like most of Skull Island's fauna, they appear to fear the Skullcrawlers, and will flee at first sight of the reptilian monsters.


A gigantic precursor to the Phasmatodea order, the Spore Mantis is, in essence, a stick insect the size of a mature redwood tree. The limbs of its bark-skinned body house a powerful muscle system that is a unique interweaving of striated tendons and fibrous structural tissues more commonly found in the stems and roots of trees. These appendages allow the Spore Mantis to scuttle across the ground at alarming speed.
A new king of trees has been crowned. The General Sherman tree might have the record in terms of height, but then again the General Sherman can't get up and hunt you down.
Housed within an epidermis of bark and vascular tissue, the Spore Mantis' trunk is host to a large, slug-like parasite with spiked teeth and bone-crushing jaws. The digestive system uses a protein-rich sap to digest and encase the bodies of its prey, before excreting the remains, perfectly preserved as crystalline amber droppings that clearly reveal what it has eaten within. Our cryptobiology department appreciates the transparency.

— Monarch Creature Profile


Kong: Skull Island

Jack Chapman encounters a Spore Mantis while trying to navigate through the island on his own. After startling the Spore Mantis, he fires several rounds at the insectile monster as it looms over him. Upon spotting a juvenile Skullcrawler approaching from behind Chapman, the Spore Mantis turns and flees, leaving Chapman to be devoured by the Skullcrawler.



The Spore Mantises wooden tree-like bodies allow them to blend in with the surrounding forests. When lying dormant against the ground, Spore Mantises resemble fallen trees.

Endurance and stamina

Within their large log-like bodies, Spore Mantises are granted basic protection against weather and smaller predators. Their bark-like skin can repel bullets from rifles. A Spore Mantis seen fleeing a juvenile Skullcrawler in Kong: Skull Island suggests that the insectile monsters can easily fall prey to the ravenous reptiles if not careful.


Spore Mantises hunt prey that are smaller or similar in size to itself, but they will give up their meal to larger and fiercer predators such as Skullcrawlers in order to survive.

Jaw strength

The Spore Mantises' jaws are strong enough to crush bones.


The Spore Mantises' muscular appendages allow the insects to run across the ground at great speed. A Spore Mantis can be seen quickly fleeing a Skullcrawler in Kong: Skull Island.





  • Despite its name, the Spore Mantis does not resemble an actual mantis (lacking the trademark clasping forelimbs) and instead looks more like a stick insect.
    • In real life, however, some species of animals have names that are different from what they are (e.g. sea lions being pinnipeds instead of lions, prairie dogs being rodents instead of dogs, titmouses being birds instead of mice, and most insects with the word "flies" in their names being unrelated to actual flies.).
    • It is possible that the name is a reference to Kamacuras, a kaiju who is an actual mantis.

List of appearances



Kong: Skull Island
Film-based kaiju
Godzilla kaiju
King Kong kaiju
Mothra kaiju
Gamera kaiju
Other kaiju
Scrapped kaiju