Hydrobiomorpha casta
In 3 days ~20% in a week ~30%
Hydrobiomorpha casta is a species of water scavenger beetle in the family Hydrophilidae. It is found in the Caribbean, Central America, and North America. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Big Cypress National Preserve | 🇺🇸 United States | |
| 2 | Everglades National Park | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Hydrobiomorpha casta sighting in Everglades National Park on a given day, based on 15 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 213th most-seen of the 496 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
May–September and November
In those months about 10% of wildlife watchers report a Hydrobiomorpha casta in Everglades National Park on a given day, against under 5% in October and December–April, the lowest months. Those are among Everglades National Park's wettest months, with about 160 mm of rain a month against 40 mm in March.
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most Hydrobiomorpha casta sightings with a recorded time, and about 9 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
Among the best
Of the 2 parks where we can rate Hydrobiomorpha casta sightings, Everglades National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Big Cypress National Preserve (United States, about 10%).
GBIF citizen-science records
It is estimated from how often the Hydrobiomorpha casta is recorded against all the insects logged in Everglades 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.
