Brown Silver-line

Petrophora chlorosata

Petrophora chlorosata, the brown silver-line, is a moth of the family Geometridae found in Asia and Europe. The larvae feed on bracken. It was first described by the Italian physician and naturalist, Giovanni Antonio Scopoli in his 1763 Entomologia Carniolica. Source

Where it is now

No records in the last 8 weeks. It may be out of season where the observers and sensors are.

See the Brown Silver-line on the live map

Movement and weather

Each season it is first heard regularly where daytime highs are around 15°C (typically 9 to 15°C, from 6 areas).

Arrival dates

The week it was first heard regularly in each region, after at least six weeks away. Dates differ from south to north, so a region has a range.

Download every area as CSV

Figures are effort corrected and come from automatic sound identification, which makes mistakes. How this is measured and how it compares with human observers.