Wildlife Populations Fell 73%—But the Number Is Not a Global Census
Living Planet Index
A measure that tracks changes in monitored wild animal populations.
vertebrate
An animal with a backbone.
population trend
A record showing whether an animal group grows or shrinks over time.
What happened
The World Wildlife Fund (WWF, a conservation organization) published its 2026 Living Planet Report. The Zoological Society of London (ZSL, a scientific organization that studies animals) produces the Living Planet Index, or LPI, used in the report. The index tracks wild vertebrate populations, including mammals, birds, fish, reptiles, and amphibians. From 1970 to 2022, the average size of monitored populations fell by 73%. The dataset contains 35,803 population trends from 5,790 species. A population is a group of one species living in one place. The WWF report presents the result as a serious warning, while also showing that recovery can happen.
What the 73% means
The 73% figure is easy to misunderstand. It does not mean that 73% of all animals disappeared. It does not mean that 73% of species became extinct. It does not even mean that every monitored population declined. Instead, the LPI combines the proportional changes in many monitored populations. Each population is compared with its earlier size, then the trends are combined into one global measure. A separate breakdown found that 50% of the monitored populations declined, 43% increased, and 7% stayed stable. The overall index fell sharply because the declining populations lost more than the growing populations gained. The Our World in Data analysis explains this distinction clearly.
Where the decline is strongest
The results vary by habitat and region. Freshwater populations had the steepest habitat decline, at 85%. Terrestrial populations fell by 69%, and marine populations by 59%. Latin America and the Caribbean recorded a 95% decline, followed by Africa at 80% and the Asia-Pacific region at 49%. North America recorded 28%, while Europe and Central Asia recorded 23%. These comparisons need context. Large human impacts were already visible in Europe and North America before the index began in 1970, so a smaller decline does not necessarily mean those regions are healthier today.
Why it matters
The report identifies habitat loss and degradation, especially from agricultural expansion, as the most frequently reported driver. Overexploitation, climate change, pollution, invasive species, and disease also contribute. This makes the issue broader than wildlife protection. Healthy natural systems support food, water, and economic security. The report also points to recoveries in bluefin tuna, tigers, green sea turtles, and southern African elephants. These examples suggest that protection, better management, and cooperation can reverse some losses.
What the index cannot tell us
The LPI is an indicator, not a census of every living thing. It covers monitored vertebrates. It does not include plants or invertebrates such as insects. Monitoring is also uneven across places, species, and years. Remote tropical regions often have larger gaps, and historical data cannot be recreated perfectly. The index can show a strong warning signal, but it cannot directly provide the total number of animals lost or the number of extinct species. Its methods and representation continue to receive scientific scrutiny.
What to watch next
Future editions should expand monitoring in poorly covered regions and animal groups. They should also be read carefully, because each edition can add populations, species, and longer records. A new result is not a simple measurement of only the latest few years. The key questions are whether habitat destruction slows, whether food and finance systems become more nature-friendly, and whether successful recoveries spread beyond a few examples. Those changes will show whether the global decline is beginning to turn.
What Does the 73% Wildlife Drop Mean?
📰 Full story: Wildlife Populations Fell 73%—But the Number Is Not a Global Census
Scientists found a large decline in monitored animal groups. The number needs careful explanation.
habitat
A place where an animal lives.
freshwater
Water in rivers and lakes, not the ocean.
monitored
Watched and measured over time.
💡 The gist
- Monitored animal groups became 73% smaller on average.
- This does not mean 73% of all animals vanished.
- Many animals and places are still poorly counted.
What did scientists study?
The World Wildlife Fund (WWF, a group that protects nature) published a 2026 report. The Zoological Society of London (ZSL, a group that studies animals) provides the main index.
The Living Planet Index, or LPI, follows wild animal groups over time. An animal group means one species living in one area. Scientists used records from 1970 to 2022. The study covered mammals, birds, fish, reptiles, and amphibians.
What does 73% mean?
The number describes the average size change in monitored groups. It does not count every animal on Earth. About 50% of the groups declined. About 43% grew. About 7% stayed stable. The falling groups lost more than the growing groups gained.
Why did groups decline?
Farms can replace animal habitats. Hunting and fishing can remove too many animals. Climate change can alter food and living conditions. Pollution can damage rivers, land, and seas. Freshwater groups had the largest decline, at 85%. Terrestrial groups fell 69%. Marine groups fell 59%.
What are the limits?
The index covers vertebrates, or animals with backbones. It does not cover insects, other invertebrates, or plants. Some regions have fewer old records. Tropical and remote places can be harder to monitor. Therefore, scientists cannot use 73% as a total count of all animals.
What happens next?
Researchers need more long-term monitoring. People also need to protect habitats and reduce the causes of decline. Some tuna, tigers, and turtles have recovered after strong protection. The next reports will show whether such recoveries become more common.
Many Wild Animal Groups Became Smaller
📰 Full story: Wildlife Populations Fell 73%—But the Number Is Not a Global Census
People counted some wild animals, and many groups got smaller.
Living Planet Index
A way to track whether animal groups grow or shrink.
The World Wildlife Fund (WWF) helps protect wild animals.
The Zoological Society of London (ZSL) helps study animals.
They used the Living Planet Index.
It is a way to track animal groups.
A group means one kind living in one place.
From 1970 to 2022, watched groups became 73% smaller on average.
This does not mean 73% of all animals vanished.
Some groups grew.
Some groups stayed the same.
Many animals were not counted well.
Animals need forests, rivers, and seas.
When those places change, animals can struggle.
People can protect animal homes.
Some animals can return when people help them.