Photo © Sue Loader

Dotted Border Wave

Idaea sylvestraria

Checklist Number
70.010 [B&F: 1701]

Verification
Record will require further evidence, at least a good photograph, unless CMR is aware recorder has confidence in identification

Classification

Family:Geometridae
Subfamily:Sterrhinae
Genus:Idaea
Species:sylvestraria
Authority:(Hübner, [1799])

Nationally scarce (Nb) in scrubby heathland, mostly in south-eastern England, with scattered colonies from Sussex to Yorkshire and Lancashire. In our area, scarce but most frequent in the New Forest, with occasional reports from the north-east of Hampshire, with scattered records from elsewhere: all records away from the core areas will require photographic evidence at least to confirm records. Wingspan 20-23 mm. Apart from the very local Silky Wave I. dilutaria, which may also have small terminal dots on both wings, the main confusion species is Satin Wave I. subsericeata, which usually lacks terminal dots; Dwarf Cream Wave I. fuscovenosa has terminal dashes instead of dots. Larva feeds on Wild Thyme, Dyer's Greenweed and Petty Whin.

The abundance in each month is indicated as follows:

No records
Very occasional
Irregular
Uncommon
Off-peak, but not unusual
Off-peak, but not unusual
Main flight time
J F M A M J J A S O N D
Adult
Larval

Records by week (adult)

Records by week (larval)

No Larval records to show.