view of a female Holly Blue on Nasturtium, showing upper wings

Holly Blue. Photo: Ann Barlow

Ann spotted this lovely female Holly Blue in her Corfe Mullen garden on 27/08/18.

The Holly Blue is primarily found in the southern half of the British Isles, and is a frequent visitor to gardens. This species is renowned for fluctuating wildly in numbers, forming a predictable cycle over a few years, believed to be caused by parasitism from the wasp Listrodomus nycthemerus whose sole host is the Holly Blue.

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