UK Endangered Species: What's at Risk and How You Can Help

The UK is now classed as one of the most nature-depleted countries on Earth. That’s not campaign rhetoric, it’s the conclusion of the State of Nature 2023 report, the most comprehensive assessment of British wildlife ever compiled, put together by more than 50 conservation and research organisations.

What the Data Actually Shows

Since monitoring began in 1970, the abundance of studied species in the UK has declined by an average of 19%, according to the State of Nature partnership. Nearly one in six of the more than 10,000 species assessed are now at risk of being lost from Great Britain entirely.

Species Spotlight

Red Squirrel

Once widespread across Britain, red squirrels have been pushed into isolated pockets, largely by competition from the introduced grey squirrel and squirrelpox, a disease grey squirrels carry without symptoms but which is usually fatal to reds. Dedicated projects like the Saving Scotland’s Red Squirrels programme have stabilised or grown populations in specific localised areas, though the report is clear that halting a decline isn’t the same as recovery, the longer-term Global Biodiversity Framework goal is restoring species to genuinely healthy, resilient population levels by 2050.

Hedgehog

Once one of Britain’s most familiar garden visitors, hedgehog numbers have dropped to an estimated 879,000, according to the State of Britain’s Hedgehogs 2022 report. Only around one in five UK residents report having actually seen one in the wild. Hedgehogs are now listed as vulnerable to extinction on the British Red List for Mammals.

Butterflies and Moths

Butterflies requiring specific habitats have declined by an average of 18%, and moths by 31%, according to Butterfly Conservation’s analysis of the report. Roughly 80% of UK butterfly species have declined since the 1970s, and half are now on the Red List. Because butterflies are sensitive to habitat quality, conservationists treat them as an indicator species, a signal for the health of the wider ecosystem, not just their own numbers.

Why This Is Happening

Two drivers stand out above the rest. Intensive farming and the ongoing effects of climate change are identified as the two biggest causes of nature loss on land, according to the National Trust’s summary of the report. At sea, unsustainable fishing and climate change dominate. Habitat condition compounds the problem: only 14% of habitats important for wildlife were assessed as being in good condition, including just 7% of woodlands.

What’s Actually Working

The report isn’t purely bad news. Where large-scale, well-funded restoration has happened, it demonstrably works. The Cairngorms Connect project, covering 60,000 hectares, has benefited a wide range of woodland-dependent species. In Lyme Bay, banning trawling in 2008 led to a marked increase in species numbers within the protected area. On farmland, the RSPB’s Hope Farm saw breeding bird populations increase by 177% over 12 years while still producing food, evidence that conservation and agriculture aren’t automatically at odds.

What You Can Actually Do

Individual action can’t replace large-scale habitat restoration, but it isn’t meaningless either, gardens collectively cover a significant amount of UK land.

• Build a wildlife-friendly garden — even a small pond or log pile provides genuine habitat value.
• Plant for pollinators specifically — choosing RHS-endorsed plants directly supports species already in documented decline.
• Cut a hedgehog highway. A 13cm gap in garden fencing lets hedgehogs travel the 1–2km they typically need each night to find food and mates.
• Report sightings. Citizen science projects like the RSPB’s Big Garden Birdwatch and local hedgehog mapping schemes feed directly into the data used in reports like this one.
• Support targeted conservation charities working on species-specific programmes, like the Saving Scotland’s Red Squirrels project or Butterfly Conservation, rather than only general environmental causes.

Frequently Asked Questions

Is it too late to reverse UK species decline? Conservationists involved in the report are explicit that it isn’t, but only if restoration happens at a much larger scale than current efforts. Successful, well-funded projects already show measurable results; the issue is one of scale and speed, not feasibility.

What’s the single most effective thing an individual can do? There’s no single best action, but combining habitat creation (a pond, native planting, shelter) with participation in citizen science reporting tends to have the most compounding value, since it both helps locally and improves the data conservationists rely on.

The State of Nature report is grim reading, but it’s also a rare case where the evidence for what works is just as clear as the evidence for what’s failing, which makes individual action feel less symbolic than it might otherwise.