Euchromius ocellea
In 3 days ~10% in a week ~20%
Euchromius ocellea, the necklace veneer or belted grass-veneer, is a cosmopolitan migratory species of moth of the family Crambidae, first described by Adrian Hardy Haworth in 1811. It has Hodges number 5454. The species has a cosmopolitan distribution. It is widespread in tropical and subtropical regions, while it is a rare migrant in some other parts of its range, such as the UK and the Netherlands.
Larvae of Euchromius ocellea have a white body with amber pinacula and a pale amber head, and grow to a length of 18–20 mm. They feed on maize (Zea mays) and sorghum (Sorghum bicolor). Euchromius ocellea has a wingspan of 13–27 mm.
The ground colour of the forewings was given by Schouten as creamy white with a dense suffusion of ochreous to dark brown scales; while Goater described it as pale greyish ochreous. The forewings have a number of markings, including two medial bands, a subterminal line, a white patch near the terminal area, and a number of black dots in the terminal area. Goater additionally mentions fine silver streaking on the entire wing; golden metallic spots near the black terminal dots; and, in male... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Big Bend National Park | 🇺🇸 United States |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Austin | 🇺🇸 United States | |
| 2 | Dallas | 🇺🇸 United States | |
| 3 | Kharkiv | 🇺🇦 Ukraine | |
| 4 | Houston | 🇺🇸 United States | |
| 5 | Bucharest | 🇷🇴 Romania | |
| 6 | Kyiv | 🇺🇦 Ukraine | |
| 7 | San Antonio | 🇺🇸 United States | |
| 8 | Portland | 🇺🇸 United States | |
| 9 | Monterrey | 🇲🇽 México | |
| 10 | San Diego | 🇺🇸 United States |
Rare
Under 5% of wildlife watchers report a Belted Grass-Veneer sighting in Portland on a given day, based on 24 verified sightings from GBIF citizen-science data. It is the 226th most-seen of the 507 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.
July and August
In those months about 10% of wildlife watchers report a Belted Grass-Veneer in Portland on a given day, against under 5% in September to June, the lowest months. Those are among Portland's driest months, with about 15 mm of rain a month against 250 mm in December.
Between 8 and 11 pm
Across all the parks we cover, that three-hour window holds the most Belted Grass-Veneer sightings with a recorded time, and about 9 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
8th of 13
Of the 13 cities where we can rate Belted Grass-Veneer sightings, Portland ranks 8th at under 5%. The best odds are in Austin (United States, about 10%), Dallas (United States, about 10%) and Kharkiv (Ukraine, about 10%).
Same family: Crambidae
The closest relatives of the Belted Grass-Veneer that you can see in Portland (family Crambidae, Crambid Snout Moths) are Inornate Pyrausta Moth (about 10%), California Pyrausta Moth (about 10%) and Topiary Grass-Veneer (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Belted Grass-Veneer is recorded against all the insects logged in Portland (24 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.
