Their 3,500-acre farm was failing in England's West Sussex. Isabella Tree and Sir Charles Burrell stopped farming it, and 20 years later rare birds, butterflies and wildlife have returned

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A struggling 3,500-acre farm in West Sussex took an unexpected turn when Isabella Tree and Sir Charles Burrell stopped conventional farming and began rewilding Knepp. Two decades later, rare nightingales, turtle doves, purple emperor butterflies, beavers and white storks have returned, transforming the estate into a thriving wildlife haven and commercial enterprise.