Holly Blue Butterfly (Celastrina argiolus)



The Holly Blue (Celastrina argiolus) is small blue butterfly that may be seen from early spring, often in and around habitat where established Ivy (Hedra helix) and Holly (Ilex aquifolium) are growing in a sunny sheltered position.


The Holly blue may be found in this type of habitat in hedgerows, woodland, urban gardens and parks across Southern England, Wales and Southern Ireland.

Holly Blue butterflies lay two broods of eggs the first in Holly (Ilex aquifolium) April – May, and the second  brood on Common Ivy (Hedera helix) August – September.

Holly Blue Butterfly- Female-with wings open

Holly Blue Butterfly- Female-with wings open

Holly-Blue-Butterfly (Celastrina-argiolus) on Holly (Ilex aquifolium)

Holly Blue Butterfly (Celastrina-argiolus) on Holly

Upper wings are violet blue and are only occasionally seen, while the butterfly is nectaring or resting, although after periods of cloud cover or rain, they may be seen sunbathing for brief periods, with wings open taking full advantage first available warm sun light.


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