Overview
The New Zealand Velvet Worm (Peripatoides novaezealandiae), known in Māori as ngaokeoke, is a living evolutionary marvel belonging to the ancient phylum Onychophora. Having survived largely unchanged for more than 500 million years since the Cambrian period, this velvet-textured predator bridges morphological traits of segmented annelid worms and jointed arthropods, renowned for firing twin squirts of entangling adhesive slime to subdue prey in total darkness.
Biology and Physical Characteristics
Peripatoides novaezealandiae features a cylindrical, unsegmented body supported by 15 pairs of conical, unjointed walking legs (lobopods) tipped with tiny curved claws. Its skin has a soft, plush texture resembling velvet, resulting from thousands of microscopic waterproof dermal papillae colored in deep indigo-blue, slate, or charcoal with subtle reddish undertones. On its head sit a pair of fleshy, sensitive antennae, simple bead-like eyes, and a pair of specialized oral slime papillae capable of ejecting pressurized streams of proteinaceous glue.
Behavior and Ecology
Strictly nocturnal and highly susceptible to desiccation due to non-closing tracheae, velvet worms spend daylight hours hidden deep inside decaying, rotting logs where relative humidity approaches 100 percent. At night, they emerge to stalk small invertebrates. Upon cornering a cricket or woodlouse, the velvet worm contracts internal muscular reservoirs, firing two streams of fast-curing liquid slime up to a foot away. The slime polymerizes instantly into rigid nylon-like threads upon contact with air, pinning the victim while the velvet worm injects digestive saliva to dissolve and consume the prey.
Conservation and Human Impact
Peripatoides novaezealandiae is protected under New Zealand wildlife legislation. Primary ecological threats stem from native forest clearance, firewood collection, and desiccation of native forests caused by invasive pest browsing and climate warming. Fenced ecosanctuaries such as Zealandia in Wellington and protected national parks provide crucial secure habitats for these ancient Gondwanan survivors.
Interesting Factoid
The velvet worm hunts by shooting twin jets of specialized liquid slime from head papillae that harden in less than a second into sticky, unbreakable threads, trapping prey before it can react.
Last updated: October 2026