Common in gardens and a wide variety of other habitats. The adults are seen from mid May to mid August, and are typically white with black 'peppered' markings.
Two darker forms are more common where the trunks of trees are blackened by pollution. This is a classic example of evolution in action and has been much studied.

f. carbonaria: Sooty black, frequent in industrial areas correlating with levels of industrial pollution.

f. insularia: Genetic intermediate form, not a result of mixed mating, again more frequent in polluted areas.

Recorded in 66 (96%) of 69 10k Squares.
Last Recorded in 2010.

List Species Records   [Limited Access]

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Similar Norfolk Species
Oak Beauty Biston strataria

Detailed Flight & Distribution [click map]

Further info: Biston betularia   Suffolk Moths Hants Moths Northamptonshire Moths HMBG Essex Field Club Svenska fjarilar Lepiforum.de NBN Gateway Link to this page... ( www.norfolkmoths.co.uk?bf=19310 )

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