Psyche casta
In 3 days ~20% in a week ~30%
Psyche casta is a nocturnal moth from the family Psychidae, the bagworm moths. The wingspan of the males ranges from 12 to 15 millimeters. They have hairy, brown-metallic shiny wings. The grub-like females have legs but do not have wings and are yellowish or light brown, except for some dark brown back plates.
The host plants are from the groups: Poaceae, birch, willow, poplar and Vaccinium. The caterpillars make a protective hull from grass. The flight time ranges from May to July. Originally from the Old World, they have been introduced in North America. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Shenandoah National Park | 🇺🇸 United States | |
| 2 | Cévennes National Park | 🇫🇷 France | |
| 3 | Bavarian Forest National Park | 🇩🇪 Germany | |
| 4 | Acadia National Park | 🇺🇸 United States |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | London | 🇬🇧 United Kingdom | |
| 2 | Boston | 🇺🇸 United States | |
| 3 | Amsterdam | 🇳🇱 Netherlands | |
| 4 | Minneapolis [Saint Paul] | 🇺🇸 United States | |
| 5 | Rotterdam [The Hague] | 🇳🇱 Netherlands | |
| 6 | Washington | 🇺🇸 United States | |
| 7 | Philadelphia | 🇺🇸 United States | |
| 8 | Munich | 🇩🇪 Germany | |
| 9 | Vienna | 🇦🇹 Austria | |
| 10 | Miami | 🇺🇸 United States |
With luck
About 10% of wildlife watchers report a Common Bagworm Moth sighting in Amsterdam on a given day, based on 8 verified sightings from GBIF citizen-science data. It is the 138th most-seen of the 234 insects we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
May–June and August
In those months about 10% of wildlife watchers report a Common Bagworm Moth in Amsterdam on a given day, against under 5% in July and September–April, the lowest months.
Between 10 am and 1 pm
Across all the parks we cover, that three-hour window holds the most Common Bagworm Moth sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 18 cities where we can rate Common Bagworm Moth sightings, Amsterdam ranks 3rd at about 10%, level with the leaders once rounded. The best odds are in London (United Kingdom, about 10%) and Boston (United States, about 10%).
Same order: Lepidoptera
The closest relatives of the Common Bagworm Moth that you can see in Amsterdam (order Lepidoptera, Butterflies and Moths) are Red Admiral (about 30%), Speckled Wood (about 30%) and European Peacock Butterfly (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Common Bagworm Moth is recorded against all the insects logged in Amsterdam (8 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.
