- The rare high brown fritillary — which has declined 62% since 1970 — is making a local comeback at Old Castle Down thanks to volunteers and specially managed cow grazing.
- Clever habitat work (cutting bracken to boost dog violets and using cattle to trample but not remove bracken) creates warm microclimates essential for the caterpillars.
- What began as two men’s conservation effort has grown into a 40+ person community with social perks (monthly curry club) and practical tech like solar collars for no‑fence grazing.
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