Chrysomela aeneicollis
In 3 days ~20% in a week ~30%
Chrysomela aeneicollis is a species of leaf beetle in the family Chrysomelidae. This organism has been used as a model for studies of natural selection in nature. It is currently being investigated to study effects of environmental change on insect populations, and the evolutionary significance of variation at genes affecting metabolism and the response to stress. It has been included as a study species in the California Conservation Genomics Project, due to its presence in multiple California ecoregions and extensive knowledge of genetic variation, evolutionary ecology, and interactions with other species. Information about its range and comparisons with closely related species can be found in a review of the genus Chrysomela published in the Canadian Entomologist.
Chrysomela aeneicollis is found in western North America. Populations occur in cooler habitats in coastal regions from northern California to British Columbia, or at high elevations in the Rocky Mountains (Colorado, Alberta) and the Sierra Nevada mountains of California. In California, this leaf beetle occurs in the Sierra Nevada mountains from Lone Pine to Modoc County and coastal populations are found... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Banff National Park | 🇨🇦 Canada |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Willow Leaf Beetle sighting in Banff National Park on a given day, based on 8 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 64th most-seen of the 105 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.
June to August
In those months about 10% of wildlife watchers report a Willow Leaf Beetle in Banff National Park on a given day, against under 5% in September to May, the lowest months.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Willow Leaf Beetle sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Banff National Park, in our data
Banff National Park is the only park on Wallace's Line with enough records to rate Willow Leaf Beetle sightings: about 10% of wildlife watchers there report one on a given day.
Same order: Coleoptera
The closest relatives of the Willow Leaf Beetle that you can see in Banff National Park (order Coleoptera, Beetles) are White-Spotted Sawyer (about 30%), Seven-Spotted Lady Beetle (about 10%) and Red Net-Winged Beetle (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Willow Leaf Beetle is recorded against all the insects logged in Banff National Park (8 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.
