Acosmeryx pseudonaga
In 3 days ~30% in a week ~60%
Acosmeryx shervillii, the dull forest hawkmoth, is a moth of the family Sphingidae. The species was first described by Jean Baptiste Boisduval in 1875. It is found from the Indian subregion, Sri Lanka, to Sundaland, the Philippines and Sulawesi. Acosmeryx pseudonaga is sometimes treated as a valid species.
The colour varieties of the species have been described as separate species many times. However, they are classified as colour morphs of the single species A. shervillii. According to The Fauna of British India, Including Ceylon and Burma: Moths Volume I by G. F. Hampson:
Greyish brown; the vertex of head dark; pro-, meso-, and meta- thorax each with a dark transverse streak; dorso-lateral oblique dark stripes on each segment of the abdomen. Fore wing with nine curved and waved antemedial dark lines, the interspaces between three of the pairs of lines being filled in with dark brown, so as to form one subbasal and two antemedial bands; a dark-ringed pale speck at end of cell, the pale center being sometimes obsolete; four postmedial curved lines; an oblique dark band from beyond the middle of the costa to outer angle, in some of the forms produced outwards along... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Khao Yai National Park | 🇹🇭 Thailand |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Hong Kong | 🇨🇳 China |
With luck
About 10% of wildlife watchers report an Acosmeryx pseudonaga sighting in Khao Yai National Park on a given day, based on 11 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 86th most-seen of the 221 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.
August
In that month about 40% of wildlife watchers report an Acosmeryx pseudonaga in Khao Yai National Park on a given day, against under 5% in September to April, the lowest months. That is one of Khao Yai National Park's wettest months, with about 260 mm of rain against 15 mm in December.
Between 6 and 9 am
Across all the parks we cover, that three-hour window holds the most Acosmeryx pseudonaga sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Khao Yai National Park, in our data
Khao Yai National Park is the only park on Wallace's Line with enough records to rate Acosmeryx pseudonaga sightings: about 10% of wildlife watchers there report one on a given day.
Same family: Sphingidae
The closest relatives of the Acosmeryx pseudonaga that you can see in Khao Yai National Park (family Sphingidae, Sphinx Moths) are Yam Hawkmoth (about 20%), Jade Hawkmoth (about 20%) and Megacorma obliqua (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Acosmeryx pseudonaga is recorded against all the insects logged in Khao Yai National Park (11 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.
