Knobbled Orbweaver

socca pustulosa

The Knobbled Orbweaver (Socca pustulosa) is a highly adaptable spider found abundantly across Australia and New Zealand. Renowned for its intricate, classic circular webs, this nocturnal arachnid plays a vital role in controlling insect populations in both natural forests and suburban gardens. During the day, it exhibits an impressive display of camouflage, pulling its legs tightly against its body and resting on bark or foliage where it blends in seamlessly as a piece of debris or lichen. At night, it becomes an active architect, spinning a fresh orb web to snare flying prey. Highly variable in color and patterning, each individual displays a unique aesthetic. Its resilience and cohabitation with humans make it one of the most frequently encountered spiders in backyard settings, serving as a harmless and highly beneficial natural pest controller.

Habitat: Typically found in coastal forests, open woodlands, suburban gardens, and parks, often suspended between shrubs or tree branches.

Appearance

This small-to-medium spider is characterized by a roughly triangular abdomen featuring five distinct bumps or 'knobbles' on its posterior end. Their coloration is incredibly diverse, ranging from mottled grey and dark brown to light green, yellow, or white, often mimicry-designed to look like bark, lichen, or bird droppings. Females are notably larger than males, measuring up to 1.5 cm in body length, while males rarely exceed 0.8 cm. When resting during the day, they tuck their spiny legs tightly against their body, making their characteristic abdomen shape the most prominent identifier.

KingdomAnimaliaPhylumArthropodaClassArachnidaOrderAraneaeFamilyAraneidaeGenusSocca

Knobbled Orbweaver

Interesting facts

The five distinct 'knobs' on its abdomen give the spider its common name and help break up its silhouette to fool predators.

They spin their webs in the evening and almost completely dismantle and eat them at dawn to prevent wastage of energy and valuable silk proteins.

This spider's coloration is so highly variable that two individuals of the same species found in the same garden can look entirely different.

Special abilities

This spider consumes its entire web each morning to recycle the silk proteins, then spins a brand-new web every night.

It can compress its body and tuck its legs to perfectly resemble a piece of lichen, bark, or bird dropping to evade daytime predators.

Utilizes specialized glands to produce multiple distinct types of silk, tailored for structural support, sticky prey capture, or soft egg sac insulation.