Polyphylla hammondi
In 3 days ~10% in a week ~20%
Polyphylla hammondi, or Hammond's lined June beetle, is a species of scarab beetle in the family Scarabaeidae. It is found in Central America and North America. Adults reach a length of about 24.8–35.5 mm (0.98–1.40 in). They are highly variable in colour and have almost no stripes or mottling.
It has been recorded from Canada (Alberta, Manitoba, Saskatchewan), the United States (Arizona, Arkansas, California, Colorado, Illinois, Indiana, Iowa, Kansas, Louisiana, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Mexico, North Dakota, Oklahoma, South Dakota, Utah, Wisconsin, Wyoming, Texas) and Mexico (Aguascalientes, Chihuahua, Coahuila, Durango, Hidalgo, Jalisco, Morelos, Oaxaca, Puebla, San Luis Potosí). Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Denver | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Hammond's Lined June Beetle sighting in Denver on a given day, based on 7 verified sightings from GBIF citizen-science data. It is the 352nd most-seen of the 461 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.
July
In that month about 10% of wildlife watchers report a Hammond's Lined June Beetle in Denver on a given day, against under 5% in August to June, the lowest months. That is one of Denver's wettest months, with about 60 mm of rain against 15 mm in January.
Only Denver, in our data
Denver is the only city on Wallace's Line with enough records to rate Hammond's Lined June 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 Hammond's Lined June Beetle is recorded against all the insects logged in Denver (7 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.
