A butterfly with a narrow streak or row of dots on the underside of the hindwing and a small tail-like projection on the hindwing.
- Many genera in the family Lycaenidae.
- The leaves serve as host for the larvae of two butterflies, the white hairstreak and the brown duskywing.
- It is hoped that birds such as the lapwing, skylark and redshank will increasingly use the sites as well as butterflies such as the green hairstreak.
- Trees stabilize the ecosystem for butterflies like the great purple hairstreak.
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