Psephenus herricki
In 3 days ~10% in a week ~30%
Psephenus herricki is a species of water penny beetle in the family Psephenidae. It is found in eastern North America. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Shenandoah National Park | 🇺🇸 United States | |
| 2 | Great Smoky Mountains National Park | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Herrick's Water Penny Beetle sighting in Great Smoky Mountains National Park on a given day, based on 12 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 379th most-seen of the 822 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
May–June and September
In those months about 10% of wildlife watchers report a Herrick's Water Penny Beetle in Great Smoky Mountains National Park on a given day, against under 5% in July–August and October–April, the lowest months.
Between noon and 3 pm
Across all the parks we cover, that three-hour window holds the most Herrick's Water Penny Beetle sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 2 parks where we can rate Herrick's Water Penny Beetle sightings, Great Smoky Mountains National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Shenandoah National Park (United States, about 10%).
Same order: Coleoptera
The closest relatives of the Herrick's Water Penny Beetle that you can see in Great Smoky Mountains National Park (order Coleoptera, Beetles) are Megalodacne heros (about 40%), Asian Lady Beetle (about 30%) and Six-Spotted Tiger Beetle (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Herrick's Water Penny Beetle is recorded against all the insects logged in Great Smoky Mountains National Park (12 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.
