Isn’t humanity itself a damaging invasive species?

Outdoor cats are one of the most prevalent invasive species. They kill billions of birds every year and have made multiple species go extinct.

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Invasive species are costing the world at least $423bn every year and have become a leading threat to the diversity of life on Earth, according to a UN assessment.

The top three invasive species include water hyacinth, an aquatic plant native to tropical South America that blocks waterways and damages fisheries, the flowering shrub lantana, and the black rat.

Examples include Redonda, a mile-long rock that is part of Antigua and Barbuda in the Caribbean, where native vegetation, birds and reptiles burst back into life once invasive black rats and feral goats were removed in 2017, transforming the barren grey rock into a green island once again.

The report found that despite the recent UN global target on controlling invasive species spread, 84% did not have specific national legislation or regulations.

Some countries do have ambitious policies on the issue, such as New Zealand, which is aiming to eradicate all invasive species from its islands by the middle of the century.

Find more age of extinction coverage here, and follow biodiversity reporters Phoebe Weston and Patrick Greenfield on Twitter for all the latest news and features

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