Ampelomyia viticola
In 3 days ~10% in a week ~20%
Ampelomyia viticola, the grape tube gallmaker, is a species of gall midge found in the eastern United States and Canada. It produces green or bright red galls on New World grape vines. In 1862, Carl Robert Osten-Sacken described this species, placing it in the genus Cecidomyia. He based the description on galls on Vitis and larvae found in the vicinity of Washington, D.C.
The magazine American Entomologist had a column where readers could ask for identifications. In 1869 a reader from Piermont, New York, asked the editors about the crimson galls found on a grape leaf. The editors, Benjamin Dann Walsh and Charles Valentine Riley, responded that in unpublished manuscripts of theirs they had given the galls the name Vitis lituus and noted they were made by a gall gnat in the genus Cecidomyia. This would create a specific name Cecidomyia vitis lituus, which is an unavailable name. In 2019, this species was transferred from Schizomyia to the new genus Ampelomyia.
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| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Boston | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Grape Tube Gallmaker sighting in Boston on a given day, based on 14 verified sightings from GBIF citizen-science data. It is the 640th most-seen of the 1200 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 Grape Tube Gallmaker in Boston on a given day, so our monthly data shows no clear season.
Only Boston, in our data
Boston is the only city on Wallace's Line with enough records to rate Grape Tube Gallmaker sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Grape Tube Gallmaker is recorded against all the insects logged in Boston (14 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.
