Bulia deducta
In 3 days ~10% in a week ~20%
Bulia deducta is a moth of the family Erebidae first described by Herbert Knowles Morrison in 1875. It is found from central Mexico north to central California, Utah, Wyoming and Nebraska, east to Arkansas and Alabama. Its wingspan is 34–38 mm. Adults are on wing from March to October in the southwest.
The larvae feed on Prosopis. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Saguaro National Park | 🇺🇸 United States |
More parks will be added in future updates.
Rare
Under 5% of wildlife watchers report a Deduced Graphic sighting in Saguaro National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 300th most-seen of the 354 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.
June
In that month about 10% of wildlife watchers report a Deduced Graphic in Saguaro National Park on a given day, against under 5% in July to May, the lowest months. That is one of Saguaro National Park's driest months, with about 10 mm of rain against 55 mm in July.
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most Deduced Graphic sightings with a recorded time, and about 8 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
Only Saguaro National Park, in our data
Saguaro National Park is the only park on Wallace's Line with enough records to rate Deduced Graphic sightings: under 5% of wildlife watchers there report one on a given day.
Same family: Erebidae
The closest relatives of the Deduced Graphic that you can see in Saguaro National Park (family Erebidae, Underwing, Tiger, Tussock, and Allied Moths) are Black Witch (about 10%), Merry Graphic Moth (about 10%) and Bird Toxonprucha (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Deduced Graphic is recorded against all the insects logged in Saguaro National Park (6 verified sightings from 2019 to 2026), 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.
