Small Rivulet
Common NameSmall Rivulet
Scientific NamePerizoma alchemillata
FamilyGeometridae
SubfamilyLarentiinae
Wingspan (mm)20
Wing Patterncryptic
Primary Colorsbrown, grey, white
HabitatWoodland edges, hedgerows, gardens, damp grassy areas
Geographic RangeEurope, temperate Asia
Host PlantsGalium spp. (bedstraws), Galium mollugo (Hedge Bedstraw), Galium verum (Lady's Bedstraw)
Flight PeriodJune to August
Flight Stylefluttering
Conservation Statusleast-concern
Lifecycle NotesLarvae feed on the seeds and flowers of bedstraws, pupating in the soil over winter. It typically has one generation per year (univoltine).
Identification TipsKey features include its small size, mottled brown and grey forewings, and the distinctive, sharply angled white subterminal line that forms a jagged band across the outer part of the forewings.
Description
A small, cryptically patterned moth with mottled brown and grey forewings, characterized by a prominent, jagged white subterminal band. The hindwings are a plainer pale grey-brown.
