Acleris semipurpurana
In 3 days ~10% in a week ~20%
Acleris semipurpurana is a species in the moth family Tortricidae, and one of several species of moth commonly known as oak leaftier or oak leaf tier. The larvae feed on the leaves of oak trees in the Eastern United States and southeastern Canada which can be a major cause of defoliation. The loss of leaves can kill or damage the affected trees, which are chiefly in the Lobatae or red oak section of Quercus, or oaks.
Adult Acleris semipurpurana moths lay single eggs on oak tree branches in June which develop over winter and hatch the next April. The larvae eat tree buds and young leaves, then tie leaves together with silk (hence the name). They nest and eat inside the tied leaves, then pupate in the leaf litter on the floor in May or June. After a week or two the adult moths emerge, mate, and lay the next generation of eggs.
Oak leaftier moths lay their eggs in June each year, typically as single eggs on rough-bark twigs, typically "second year branches". The eggs overwinter, then hatch in the following spring. After larvae (or caterpillars) emerge in April, they eat the buds of oak trees and the young leaves inside them. When they are fully grown,... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Dallas | 🇺🇸 United States | |
| 2 | Austin | 🇺🇸 United States | |
| 3 | Boston | 🇺🇸 United States | |
| 4 | Toronto | 🇨🇦 Canada | |
| 5 | New York City | 🇺🇸 United States | |
| 6 | Washington | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report an Oak Leafshredder Moth sighting in New York City on a given day, based on 19 verified sightings from GBIF citizen-science data. It is the 740th most-seen of the 1623 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 an Oak Leafshredder Moth in New York City on a given day, so our monthly data shows no clear season.
Among the best
Of the 6 cities where we can rate Oak Leafshredder Moth sightings, New York City ranks 5th at under 5%, level with the leaders once rounded. The best odds are in Dallas (United States, under 5%), Austin (United States, under 5%) and Boston (United States, under 5%).
GBIF citizen-science records
It is estimated from how often the Oak Leafshredder Moth is recorded against all the insects logged in New York City (19 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.
