Rhyssomatus lineaticollis
In 3 days ~10% in a week ~20%
Rhyssomatus lineaticollis, also known by its common name milkweed stem weevil is a species of weevil whose adults feed on the stems of the common milkweed, Asclepias syriaca. It is also destructive to the rare and threatened milkweed species Asclepias meadii. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Baltimore | 🇺🇸 United States | |
| 2 | Montreal | 🇨🇦 Canada | |
| 3 | Philadelphia | 🇺🇸 United States | |
| 4 | Minneapolis [Saint Paul] | 🇺🇸 United States | |
| 5 | Washington | 🇺🇸 United States | |
| 6 | New York City | 🇺🇸 United States | |
| 7 | Toronto | 🇨🇦 Canada |
Rare
Under 5% of wildlife watchers report a Milkweed Stem Weevil sighting in Philadelphia on a given day, based on 5 verified sightings from GBIF citizen-science data. It is the 557th most-seen of the 632 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.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Milkweed Stem Weevil in Philadelphia on a given day, so our monthly data shows no clear season.
Among the best
Of the 7 cities where we can rate Milkweed Stem Weevil sightings, Philadelphia ranks 3rd at under 5%, level with the leaders once rounded. The best odds are in Baltimore (United States, under 5%) and Montreal (Canada, under 5%).
GBIF citizen-science records
It is estimated from how often the Milkweed Stem Weevil is recorded against all the insects logged in Philadelphia (5 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.
