Discophora sondaica
In 3 days ~20% in a week ~40%
Discophora sondaica, the common duffer, is a species of nymphalid butterfly found in Southeast Asia. Wikipedia →
| # | Park | Country | Daily sighting probability |
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More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Common Duffer sighting in Tuen Mun on a given day, based on 18 verified sightings from GBIF citizen-science data. It is the 218th most-seen of the 557 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
July and September
In those months about 20% of wildlife watchers report a Common Duffer in Tuen Mun on a given day, against under 5% in January–February, April and October–November, the lowest months. Those are among Tuen Mun's wettest months, with about 190 mm of rain a month against 20 mm in December.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Common Duffer sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 6 cities where we can rate Common Duffer sightings, Tuen Mun ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Taipei (Taiwan, about 10%).
Same family: Nymphalidae
The closest relatives of the Common Duffer that you can see in Tuen Mun (family Nymphalidae, Brush-footed Butterflies) are Great Eggfly (about 40%), Dark-Branded Bushbrown (about 30%) and Plain Tiger Butterfly (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Common Duffer is recorded against all the insects logged in Tuen Mun (18 verified sightings), 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.
