Golden Weaver Ant

Workers are monomorphic (a single uniform size), measuring roughly 6–8 mm, with dark bodies and sharp spines projecting from the thorax and petiole, covered in fine silvery-gold hairs that give a metallic shimmer. Queens are larger at 10–12 mm and highly productive egg-layers. This species has no stinger; instead, it defends itself by spraying formic acid from the tip of its abdomen.

Polyrhachis dives ranges widely from India and Thailand to the Philippines and northern Australia. It thrives across a remarkable range of habitats — tropical rainforest, mangroves, coastal scrubland, and even urban gardens. It is arboreal, building rounded nests from soil, bark, leaf litter, and other debris bound together with larval silk, mainly among branches and low shrubs.

The main challenge is speed and temperament — workers move very fast and readily spray formic acid when they feel threatened, so care is needed to prevent escapes during feeding or cleaning. As for colony size, the figure listed here (roughly 500–5,000 workers) reflects what's typically seen in captivity; in the wild, colonies with multiple egg-laying queens can grow into the tens of thousands.

Good to Know

Polyrhachis dives is a target for several specialized parasites, including eucharitid wasps, which lay eggs that hatch into larvae that consume ant grubs, and Ophiocordyceps unilateralis, the "zombie fungus" that manipulates infected ants into climbing to a high point before dying, helping the fungus spread its spores. Its "golden hair" name comes from the fine silvery-gold hairs covering its body, making it one of the most visually striking — and popular — spiny ants kept by hobbyists in Thailand.

Polyrhachis dives uses silk from its own larvae to stitch debris into a rounded nest — a weaving behavior that evolved independently in a genus completely unrelated to the red weaver ant.

Workers gather soil, wood fragments, and even animal droppings to build the nest's frame, then carry larvae nearing pupation and use them as living "glue tubes," prompting them to release silk that binds the structure together. This is a case of convergent evolution — two distantly related ant genera independently arriving at a similar nest-weaving trick. Colonies are typically polygynous, with several queens living together, and are fast-moving and defensive, foraging for both live prey and the sugary honeydew produced by plants and aphids.

An omnivore with a strong sweet tooth, favoring diluted honey and sugar water alongside insect protein such as fruit flies, crickets, and roaches. Ideal temperature is 25–30°C with humidity of 60–80%. Brood takes about 6–8 weeks to reach adulthood at 26–28°C. Because this species nests above ground, its enclosure should include vertical space and real branches or materials it can weave into a nest.