Choristoneura occidentalis
In 3 days ~20% in a week ~40%
For the Western spruce bud worm, elsewhere as the homonym Choristoneura occidentalis, please see Choristoneura freemani Archips occidentalis [or Choristoneura occidentalis in some schemes] is a species of moth of the family Tortricidae. It is found in the Gambia, and possibly more broadly, such as Democratic Republic of Congo, Tanzania, and South Africa.
The larvae feed on Maesopsis eminii, Pinus patula, Vigna unguiculata, Allium cepa, Cajanus, Citrus (including Citrus aurantium), Coffea (including Coffea arabica), Corchorus, Cupressus lusitanica, Eucalyptus camaldulensis, Eucalyptus torelliana, Glycine max and Gossypium species. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Jasper National Park | 🇨🇦 Canada |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Vancouver | 🇨🇦 Canada |
With luck
About 10% of wildlife watchers report a Western Spruce Budworm Moth sighting in Jasper National Park on a given day, based on 5 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 72nd most-seen of the 88 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
June to August
In those months about 10% of wildlife watchers report a Western Spruce Budworm Moth in Jasper National Park on a given day, against under 5% in September to May, the lowest months. Those are among Jasper National Park's wettest months, with about 110 mm of rain a month against 55 mm in April.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Western Spruce Budworm Moth sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is seen both by day and at night.
Only Jasper National Park, in our data
Jasper National Park is the only park on Wallace's Line with enough records to rate Western Spruce Budworm Moth sightings: about 10% of wildlife watchers there report one on a given day.
Same order: Lepidoptera
The closest relatives of the Western Spruce Budworm Moth that you can see in Jasper National Park (order Lepidoptera, Butterflies and Moths) are Pearl Crescent (about 30%), Red-Spotted Admiral (about 20%) and Mourning Cloak (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Western Spruce Budworm Moth is recorded against all the insects logged in Jasper National Park (5 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.
