Rhapsa scotosialis
In 3 days ~40% in a week ~70%
Rhapsa scotosialis, the slender owlet moth, is a moth of the family Erebidae under the superfamily Noctuoidea. This species is endemic to New Zealand and is found throughout the country. It is regarded as one of the most common forest moths found in New Zealand. The larval host species for R. scotosialis is Piper excelsum.
This species was first described by Francis Walker in 1866 from specimens collected in Nelson by T. R. Oxley. It was also described by Arthur Gardiner Butler in 1877 using the name Herminia lilacina. This latter name was subsequently synonymised by Edward Meyrick in 1887. In both 1898 and 1928 George Hudson discussed and illustrated this species in his books New Zealand moths and butterflies (Macro-lepidoptera) and The butterflies and moths of New Zealand. The male holotype specimen is held at the Natural History Museum, London.
The adults of this species were described by George Hudson as follows: The expansion of the wings is 1+3⁄8 inches. The fore-wings have the costa considerably arched towards the apex, and the termen is bowed outwards in the middle; the colour is pale brown in the male and dark brown in the female; there are... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Rakiura National Park | 🇳🇿 New Zealand | |
| 2 | Egmont National Park | 🇳🇿 New Zealand | |
| 3 | Abel Tasman National Park | 🇳🇿 New Zealand | |
| 4 | Fiordland National Park | 🇳🇿 New Zealand | |
| 5 | Arthur's Pass National Park | 🇳🇿 New Zealand |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Auckland | 🇳🇿 New Zealand |
Possible
About 20% of wildlife watchers report a Slender Owlet Moth sighting in Egmont National Park on a given day, based on 15 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 29th most-seen of the 191 insects we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
October
In that month about 40% of wildlife watchers report a Slender Owlet Moth in Egmont National Park on a given day, against under 5% in May, July and September, the lowest months.
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most Slender Owlet Moth sightings with a recorded time, and about 8 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
2nd of 5
Of the 5 parks where we can rate Slender Owlet Moth sightings, Egmont National Park ranks 2nd at about 20%. The best odds are in Rakiura National Park (New Zealand, about 30%).
GBIF citizen-science records
It is estimated from how often the Slender Owlet Moth is recorded against all the insects logged in Egmont National Park (15 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.
