Cybister fimbriolatus
In 3 days ~10% in a week ~20%
Cybister fimbriolatus, the giant diving beetle, is a species of predaceous diving beetle in the family Dytiscidae. It is found in North America and the Neotropics. These beetles are active in summer and live in ponds or ditches, feeding on other aquatic arthropods. They are nocturnal but sometimes active during the day. For mating, the males have expanded front feet to help them grab hold of a female. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Padre Island National Seashore | 🇺🇸 United States | |
| 2 | Big Cypress National Preserve | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Dallas | 🇺🇸 United States | |
| 2 | Houston | 🇺🇸 United States | |
| 3 | Orlando | 🇺🇸 United States | |
| 4 | San Antonio | 🇺🇸 United States | |
| 5 | New York City | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Fringed Diving Beetle sighting in Houston on a given day, based on 21 verified sightings from GBIF citizen-science data. It is the 458th most-seen of the 1057 insects we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Fringed Diving Beetle in Houston on a given day, so our monthly data shows no clear season.
Between 10 pm and 1 am
Across all the parks we cover, that three-hour window holds the most Fringed Diving Beetle sightings with a recorded time, and about 6 in 10 of them come between 6 pm and 6 am: it is seen both by day and at night.
Among the best
Of the 5 cities where we can rate Fringed Diving Beetle sightings, Houston ranks 2nd at under 5%, level with the leaders once rounded. The best odds are in Dallas (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Fringed Diving Beetle is recorded against all the insects logged in Houston (21 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.
