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Common on calcareous grassland, heathland, moorland, woodland rides, sand-dunes and sea cliffs throughout the British Isles. Widespread and common in Hampshire and on the Isle of Wight. Wingspan 37-43 mm. Very similar to Lesser Treble-bar A. efformata, which see. Larva feeds on St John's-wort.
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Flightime guide |
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A | M | J |
J | A | S |
O | N | D |
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