Hexatricha pulverulenta
In 3 days ~30% in a week ~60%
Hexatricha pulverulenta, commonly known as the squeaking longhorn, is a beetle in the family Cerambycidae, the only species in the monotypic genus Hexatricha. It is endemic to New Zealand. It was first described by John O. Westwood in 1843 as Lamia pulverulenta, and later moved into the genus Hexatricha (sometimes incorrectly spelled Hexathrica).
The squeaking longhorn is so called for the noise it makes, by stridulation, when handled. Female beetles lay an egg under the bark of dead or dying trees, especially Pinus radiata or New Zealand beech (Nothofagus). These hatch in 10–19 days, and larvae live under, and feed off, wood for perhaps two or three years. They pupate for 30 days, hatching from spring to autumn (August to April) into adult beetles which live for up to three months. Adults are reluctant fliers. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Rakiura National Park | 🇳🇿 New Zealand | |
| 2 | Fiordland National Park | 🇳🇿 New Zealand |
With luck
About 10% of wildlife watchers report a Squeaking Longhorn sighting in Rakiura National Park on a given day, based on 8 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 68th most-seen of the 118 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
September
In that month about 30% of wildlife watchers report a Squeaking Longhorn in Rakiura National Park on a given day, against under 5% in April–May, July–August and November, the lowest months.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Squeaking Longhorn sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 2 parks where we can rate Squeaking Longhorn sightings, Rakiura National Park has the highest daily chance: about 10%. Next come Fiordland National Park (New Zealand, about 10%).
Same family: Cerambycidae
The closest relatives of the Squeaking Longhorn that you can see in Rakiura National Park (family Cerambycidae, Longhorn Beetles) are Huhu (about 20%) and Fig Longhorn Beetle (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Squeaking Longhorn is recorded against all the insects logged in Rakiura National Park (8 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
