Hygrotus sayi
In 3 days ~10% in a week ~20%
Hygrotus sayi is a species of predaceous diving beetle in the family Dytiscidae. It is found in North America. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Vancouver | 🇨🇦 Canada |
Rare
Under 5% of wildlife watchers report a Say's Diving Beetle sighting in Vancouver on a given day, based on 15 verified sightings from GBIF citizen-science data. It is the 244th most-seen of the 482 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.
November and December
In those months about 10% of wildlife watchers report a Say's Diving Beetle in Vancouver on a given day, against under 5% in January to October, the lowest months. Those are among Vancouver's wettest months, with about 190 mm of rain a month against 25 mm in July.
Only Vancouver, in our data
Vancouver is the only city on Wallace's Line with enough records to rate Say's Diving Beetle sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Say's Diving Beetle is recorded against all the insects logged in Vancouver (15 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.
