Helastia cinerearia
In 3 days ~30% in a week ~50%
Helastia cinerearia is a moth of the family Geometridae. It is endemic to New Zealand and can be found in the North, South and Stewart Islands as well as on the Mercury and Chatham Islands. The preferred habitat of H. cinerearia includes urban gardens, various types of forest and sub alpine habitats. The larval host is lichen on rocks. The adult moths are on the wing all year round but are most commonly observed from September until February. Adult moths are nocturnal and have been observed feeding from and likely pollinating Hebe salicifolia, Hoheria lyallii and Leptospermum scoparium.
This species was first described by Edward Doubleday in 1843 and named Cidaria cinerearia. George Hudson illustrated and discussed this species under the name Xanthorhoe cinerearia in 1928 in his book The moths and butterflies of New Zealand. In 1939 Louis Beethoven Prout placed this species in the genus Larentia. In 1971 J. S. Dugdale placed this species in the genus Helastia and went on to confirm this placement in his 1988 publication Lepidoptera - annotated catalogue, and keys to family-group taxa. Robin C. Craw when revising the Helastia genus discussed this species in 1987. The... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Rakiura National Park | 🇳🇿 New Zealand | |
| 2 | Fiordland National Park | 🇳🇿 New Zealand | |
| 3 | Abel Tasman National Park | 🇳🇿 New Zealand | |
| 4 | Egmont National Park | 🇳🇿 New Zealand |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Auckland | 🇳🇿 New Zealand |
With luck
About 10% of wildlife watchers report a Helastia cinerearia sighting in Egmont National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 123rd most-seen of the 191 insects we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
May and November
In those months about 20% of wildlife watchers report a Helastia cinerearia in Egmont National Park on a given day, against under 5% in February, April and June–October, the lowest months.
Between 9 pm and midnight
Across all the parks we cover, that three-hour window holds the most Helastia cinerearia sightings with a recorded time, and about half of them come between 6 pm and 6 am: it is seen both by day and at night.
Among the best
Of the 4 parks where we can rate Helastia cinerearia sightings, Egmont National Park ranks 4th at about 10%, level with the leaders once rounded. The best odds are in Rakiura National Park (New Zealand, about 10%), Fiordland National Park (New Zealand, about 10%) and Abel Tasman National Park (New Zealand, about 10%).
GBIF citizen-science records
It is estimated from how often the Helastia cinerearia is recorded against all the insects logged in Egmont National Park (6 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.
