Rusty-dot Pearl - Udea ferrugalis
Wingspan 18 to 22 mm. The rusty orange ground colour and blackish markings on the forewing help to identify this species. Like several of its congeners, it shows distinctively whitish legs.
Can occur at almost any time of the year, sometimes in large influxes with other migrants. The adult flies at night and comes to light.
In Britain this moth is mainly a migrant species.
Occurring over much of Britain in varying numbers as a migrant species. In the Butterfly Conservation’s Microlepidoptera Report 2011 this species was classified as Migrant.
Numbers vary in Leicestershire and Rutland. Fairly frequent but not common in Leicestershire and Rutland. L&R Moth Group status = B (scarce resident or restricted distribution or regular migrant).
Leicestershire & Rutland Map
Enter a town or village to see local records
MAP KEY:
Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2025+ | 2020-2024 | pre-2020
UK Map
Species profile
- Common names
- Rusty Dot, Rusty-dot Pearl
- Species group:
- insect - moth
- Kingdom:
- Animalia
- Order:
- Lepidoptera
- Family:
- Crambidae
- Records on NatureSpot:
- 93
- First record:
- 09/09/2004 (Skevington, Mark)
- Last record:
- 05/11/2025 (Leese, Eric)
Total records by month
% of records within its species group
10km squares with records
The latest images and records displayed below include those awaiting verification checks so we cannot guarantee that every identification is correct. Once accepted, the record displays a green tick.
In the Latest Records section, click on the header to sort A-Z, and again to sort Z-A. Use the header boxes to filter the list.













