Case Study C: Rewilding at Knepp Estate, West Sussex, UK (HIC)

🦋 Case Study C: Rewilding at Knepp Estate, West Sussex, UK (HIC)

In 2001, Charlie Burrell and Isabella Tree made a decision that their neighbours thought was eccentric bordering on insane. They owned 3,500 acres of fertile farmland in the Weald of West Sussex — and they decided to stop farming it.

Not because the land was unproductive. Because intensive farming had made it biologically dead. Decades of ploughing, fertilisers, pesticides and tight grazing management had produced good yields of wheat and oilseed — but the hedgerows were empty, the ponds were silted, the soil was compacted, and the fields were silent. There were no turtle doves. No nightingales. No purple emperor butterflies. No stag beetles. The land produced food but nothing else.

What happened next became one of the most celebrated experiments in modern conservation — and a case study that examiners love because it is genuinely surprising.

The Rewilding Approach

Rewilding means removing intensive human management and allowing natural processes to reassert themselves. At Knepp, this meant:

• Stopping all ploughing, pesticide use, and intensive grazing
• Introducing free-roaming large herbivores to mimic the natural grazing patterns of pre-agricultural Britain: longhorn cattle, Tamworth pigs, Exmoor ponies, and fallow deer — all of which create different habitats through their feeding and movement
• Allowing natural scrub and woodland to develop wherever it chose, without human direction
• Creating new ponds, allowing rivers to meander naturally, and removing drainage infrastructure
• No introduction of specific plants or tree species — the emphasis was on letting nature decide what grew where

The Results — Twenty Years Later

• Turtle doves — critically endangered in the UK, with numbers down 98% since 1970 — now breed at Knepp. It hosts approximately 2–3% of the entire UK population.
• Nightingales — one of Britain's most threatened species — have 20+ breeding pairs, more than anywhere else in the UK
• Purple emperor butterflies — Britain's largest butterfly, rare elsewhere — appear in their hundreds in summer
• White storks nested at Knepp in 2020 — the first successful white stork nesting in Britain for over 600 years
• All five UK species of owl are present; peregrine falcons, hobbies and red kites breed regularly
• Massive recovery in insect abundance — critical for pollination and the food chain
• Soil carbon levels have increased substantially; the land now acts as a carbon sink rather than a carbon source

The Economics

Perhaps the most important lesson from Knepp for geographers: rewilding is not just ecologically successful — it is financially successful. The estate has developed a safari-style tourism business (glamping safaris, guided wildlife walks, educational visits) that generates approximately £2.5 million per year — significantly more than the intensive farming it replaced. The wildland beef and pork from the free-roaming herds sells at premium prices. The book written by Isabella Tree about the project became a bestseller. Wildlife documentaries have been filmed there. The land is now worth more wild than it was farmed.

Evaluation: Brilliant — But Scalable?