Morley’s Final Catalogue: In profusion on oak-trunks and palings everywhere about woods; unnoted in the west. Bentley in abundance, Parham, Letheringham, Glemham Magna, Aldeburgh, Leiston, Flixton, Fritton, Gorleston.
Recent Status: A common species in Suffolk.
Life Style: A single brooded species that can be found from April to August. The larvae feed from spun or folded leaves of deciduous Quercus. They pupate in a cocoon in the larval habitation or on the foodplant.
Identification: The species has a narrower dorsal patch than Z. griseana and a broadly arched costa. The colour is more even than the smaller Z. ratzeburgiana. Male Zeiraphera have no costal fold. Z. isertana is more commonly black marked but can be brown and the intensity of the markings can vary making some specimens largely black or alternately an overall grey or brown colour.
Recorded in 38 (66%) of 58 10k Squares. First Recorded in 1977. Last Recorded in 2019. Additional Stats