Melaphis rhois
In 3 days ~10% in a week ~20%
Melaphis rhois is an aphid species first identified by Asa Fitch in 1866. Known as the staghorn sumac aphid, it is in the genus Melaphis. It is a type of woolly aphid and one of the few aphids that induce the formation of galls. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Shenandoah National Park | 🇺🇸 United States |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Boston | 🇺🇸 United States | |
| 2 | Toronto | 🇨🇦 Canada | |
| 3 | Minneapolis [Saint Paul] | 🇺🇸 United States | |
| 4 | Montreal | 🇨🇦 Canada | |
| 5 | Washington | 🇺🇸 United States | |
| 6 | New York City | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Sumac Gall Aphid sighting in Montreal on a given day, based on 15 verified sightings from GBIF citizen-science data. It is the 431st most-seen of the 926 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.
August
In that month about 10% of wildlife watchers report a Sumac Gall Aphid in Montreal on a given day, against under 5% in September to July, the lowest months.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Sumac Gall Aphid sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
4th of 6
Of the 6 cities where we can rate Sumac Gall Aphid sightings, Montreal ranks 4th at under 5%. The best odds are in Boston (United States, about 10%), Toronto (Canada, under 5%) and Minneapolis [Saint Paul] (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Sumac Gall Aphid is recorded against all the insects logged in Montreal (15 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.
