Nature and Biodiversity

Lost and found: 6 rediscovered species (including the tap-dancing spider)

Bee on a flower.

the giant bee is a new rediscovered species. Image: Unsplash/Dmitry Grigoriev

David Elliott
Senior Writer, Forum Agenda
Share:
Our Impact
What's the World Economic Forum doing to accelerate action on Nature and Biodiversity?
A hand holding a looking glass by a lake
Crowdsource Innovation
Get involved with our crowdsourced digital platform to deliver impact at scale
  • There are more than 2,200 lost species across 160 countries but some – like the leopard-spotted fish and the giant bee – have been ‘refound’.
  • Protecting and restoring nature is vital to wellbeing, societies and economies, say scientists.
  • The World Economic Forum’s Nature Action Agenda is working to unite the public and private sectors in a bid to halt biodiversity loss by 2030.

Have you heard of the fat catfish, pink-headed duck or Himalayan quail? If not, that might be because they are lost species – plants, animals and fungi that have been lost to science for at least 10 years, but sometimes hundreds.

Species can become lost for a variety of reasons. Healthy populations can decline due to threats including disease and habitat destruction. They might live in areas difficult for scientists to reach. Or they might have always existed in small numbers in regions where one disturbance could wipe out the whole population.

There are more than 2,200 lost species across 160 countries, according to Re:wild. The wildlife protection and restoration organization has compiled a list of these species, with the hope that finding them will help with efforts to protect and restore our planet’s ecosystems.

While the fat catfish – last seen in 1957 in Colombia – is still officially missing, there is good news for others. Here are six species that have been rediscovered.

Have you read?

1. Tap-dancing spider

Fagilde’s trapdoor spider, endemic to mainland Portugal, was refound after a painstaking two-year search that involved combing forested areas for silk-covered burrows. This uncovered a burrow constructed differently to those typical of trapdoor spiders, and DNA analysis confirmed the female living there was the first Fagilde’s trapdoor spider seen for 92 years. Do they really tap dance? Apparently so – it’s thought that when attempting to attract a mate, the male performs a rhythmic dance at a female’s door.

2. Leopard-spotted fish

“We dropped everything and would have gone to the ends of the Earth to see this fish, this legend, alive in the wild,” said one of the researchers responsible for the rediscovery of the leopard barbel in early 2024. Once abundant in the Tigris-Euphrates river system in Eastern Turkey, Eastern Syria, Iran and Iraq, the species was pushed to near extinction by factors including pollution and habitat destruction and was last scientifically documented in 2011. The fish is listed as one of the most endangered in the world – scientists have hailed its rediscovery as an important moment in the fight to protect the region’s freshwater ecosystems.

Loading...

3. Earless dragon

Once commonly found in the grasslands to the west of Melbourne, Australia, the last confirmed sighting of the Victorian grassland earless dragon was in 1969. That was until 2023, when the tiny lizard, which lacks an external ear opening, was rediscovered in a 'secret' location. The species is listed as critically endangered by local government and officials have declined to reveal the whereabouts of the rediscovered population for conservation reasons.

4. Long-beaked echidna

If any species could be described as interesting, it would be the echidna. It's a mammal. It lays eggs. And it has been called a “living fossil” – its origins stretch back to when dinosaurs walked the Earth. Attenborough's long-beaked echidna, named after the British broadcaster and biologist Sir David Attenborough, is thought to be the most threatened of three long-beaked echidna species. After being lost to science for 62 years since it was last seen in Indonesia, it was rediscovered in 2023.

Loading...

5. Climbing salamander

The critically endangered Jackson's climbing salamander was lost for 42 years. It is a cloud forest species known for being "adept at escaping human attention" – except, maybe, for the one rediscovered in 2017 in Guatemala, which was spotted by a park ranger during his lunch break.

Discover

How does the World Economic Forum encourage biological diversity?

6. Giant bee

How big can a bee be? At up to 4.5cm long with a wing span of 6cm – about the size of an average human thumb – the female Wallace's giant bee is the largest in the world. It had not been seen in the wild since 1981 and was feared to be extinct. But in early 2019, a team of US and Australian scientists found the species again at the end of a five-day trek in a remote part of north-east Indonesia. Its rediscovery was described as "a monumental moment" that the scientists hoped would spur its preservation.

Loading...

While the rediscovery of these species can lead to successful conservation, some researchers have noted it is important that efforts focus on all kinds of species, not just those that humans may consider to be more charismatic.

With the world seeing a rapid loss of species between 1,000 and 10,000 times higher than the natural extinction rate, according to WWF, addressing nature loss and degradation is crucial. Not least because over half of the world’s GDP is highly or moderately dependent on natural resources and services.

Nature positive: halt and reverse biodiversity loss by 2030
Halting and reversing biodiversity loss by 2030 is crucial to securing a nature-positive future for humanity. Image: WWF

The World Economic Forum’s Nature Action Agenda is working to unite the public and private sectors in a bid to halt biodiversity loss by 2030. “Business-as-usual is no longer an option,” it says.

Loading...
Don't miss any update on this topic

Create a free account and access your personalized content collection with our latest publications and analyses.

Sign up for free

License and Republishing

World Economic Forum articles may be republished in accordance with the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Public License, and in accordance with our Terms of Use.

The views expressed in this article are those of the author alone and not the World Economic Forum.

Share:
World Economic Forum logo
Global Agenda

The Agenda Weekly

A weekly update of the most important issues driving the global agenda

Subscribe today

You can unsubscribe at any time using the link in our emails. For more details, review our privacy policy.

Ban these companies from advertising, says UN chief, and other nature and climate stories you need to read this week

Michael Purton

June 13, 2024

About Us

Events

Media

Partners & Members

  • Join Us

Language Editions

Privacy Policy & Terms of Service

© 2024 World Economic Forum