Argyresthia canadensis
In 3 days ~10%
Argyresthia canadensis, the Canadian arborvitae leafminer or cedar leafminer, is a moth of the family Argyresthiidae. It is found in North America. They are one of several arborvitae or cedar leafminer moth species damaging eastern white cedar (Thuja occidentalis) in the region, including Argyresthia aureoargentella, Argyresthia thuiella, and Coleotechnites thujaella.
There is one generation per year. The larvae feed on Thuja occidentalis. They have a green body, a dark brown head and a central brown patch on the prothoracic shield and anal plate. They reach a length of up to 7 mm. Nearly full-grown larvae overwinter in mined foliage. Full-grown larvae can be found from April to June. Pupation takes place in a whitish, spindle-shaped cocoon that is made outside of the mine on the foliage. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Toronto | 🇨🇦 Canada |
Rare
Under 5% of wildlife watchers report an Argyresthia canadensis sighting in Toronto on a given day, based on 9 verified sightings from GBIF citizen-science data. It is the 1135th most-seen of the 1689 insects we can rate there. Over three days the chance rises to about 10%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report an Argyresthia canadensis in Toronto on a given day, so our monthly data shows no clear season.
Only Toronto, in our data
Toronto is the only city on Wallace's Line with enough records to rate Argyresthia canadensis sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Argyresthia canadensis is recorded against all the insects logged in Toronto (9 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.
