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World's Heaviest Insect Makes Remarkable Comeback
5 Oct
Summary
- Giant wētāpunga numbers are recovering thanks to a breeding programme.
- Over 11,000 insects have been released into predator-free habitats.
- Conservation status improved from 'endangered' to 'recovering'.
The population of New Zealand's giant wētāpunga, once facing extinction, is now officially on the path to recovery. A comprehensive breeding program has successfully released over 11,000 of these insects into the wild, marking a significant conservation achievement.
The species, characterized by females that can weigh as much as a mouse and reach up to 10cm in length, had dwindled due to predation and habitat loss. By the 1990s, wētāpunga were presumed extinct on the mainland and confined to predator-free islands.
Through advanced breeding techniques developed over 15 years at facilities like Butterfly Creek and Auckland Zoo, thousands of wētāpunga nymphs have been reared communally. These young insects are fed a specific diet to ensure their survival before being transferred to new habitats.
This extensive effort has resulted in 45 translocations to wild habitats. Monitoring confirms self-sustaining populations, with fourth and fifth generations now born in the wild, signifying a true recovery. The species' status has thus been upgraded from 'nationally endangered' to 'nationally recovering'.
New Zealand is pioneering invertebrate recovery work, and this program's scale and success aim to encourage similar initiatives for other threatened species globally.
