Achyra rantalis
In 3 days ~20% in a week ~40%
Achyra rantalis, the garden webworm, is a moth of the family Crambidae described by Achille Guenée in 1854. It is found in North America, where it has been recorded from Maine to southern Quebec and Ontario, south to Florida and Mexico. It has also been recorded in Iowa, Colorado, California, and the West Indies. Its habitat consists of fields and gardens.
The wingspan is 17–23 millimetres (0.67–0.91 in). There may be up to four generations per year in the south. The larvae feed on the leaves of various low-growing plants, including alfalfa, beans, clover, corn, cotton, peas and strawberries. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Padre Island National Seashore | 🇺🇸 United States | |
| 2 | Big Bend National Park | 🇺🇸 United States | |
| 3 | Joshua Tree National Park | 🇺🇸 United States | |
| 4 | Saguaro National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Austin | 🇺🇸 United States | |
| 2 | Dallas | 🇺🇸 United States | |
| 3 | San Antonio | 🇺🇸 United States | |
| 4 | Ciudad Juárez | 🇲🇽 México | |
| 5 | Houston | 🇺🇸 United States | |
| 6 | Detroit | 🇺🇸 United States | |
| 7 | Boston | 🇺🇸 United States | |
| 8 | Toronto | 🇨🇦 Canada | |
| 9 | Mesa | 🇺🇸 United States | |
| 10 | Torreón | 🇲🇽 México |
With luck
About 10% of wildlife watchers report a Garden Webworm Moth sighting in Boston on a given day, based on 129 verified sightings from GBIF citizen-science data. It is the 121st most-seen of the 1200 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.
August
In that month about 20% of wildlife watchers report a Garden Webworm Moth in Boston on a given day, against under 5% in October to April, the lowest months.
Between 10 pm and 1 am
Across all the parks we cover, that three-hour window holds the most Garden Webworm 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.
7th of 21
Of the 21 cities where we can rate Garden Webworm Moth sightings, Boston ranks 7th at about 10%. The best odds are in Austin (United States, about 20%), Dallas (United States, about 10%) and San Antonio (United States, about 10%).
Same family: Crambidae
The closest relatives of the Garden Webworm Moth that you can see in Boston (family Crambidae, Crambid Snout Moths) are Elegant Grass-Veneer (about 10%), Common Grass-Veneer (about 10%) and Celery Leaftier Moth (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Garden Webworm Moth is recorded against all the insects logged in Boston (129 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.
