We're Finding New Species Faster Than Ever—But Is It Fast Enough?

We've mapped every continent, sequenced the human genome, and built AI that can identify birds by their songs. Yet for every species we've cataloged on Earth, roughly nine more are waiting in unexplored caves, unsampled rivers, or museum drawers where they've been gathering dust for decades.

It's a staggering thought: scientists estimate we've identified only about one-tenth of all species on our planet. As University of Arizona ecologist John Wiens puts it, "It's a poorly known planet that we live on."

And many of those unknown residents are running out of time.

The Museum Drawer Mystery

Here's what might surprise you most: hundreds of thousands of unnamed species are already sitting in museum collections right now. A quarter of new species descriptions involve specimens more than 50 years old. Some have been waiting in drawers since before the moon landing.

The urgency is real. The Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services estimates around 1 million animal and plant species are threatened with extinction. Current extinction rates are somewhere between 100 and 1,000 times the natural background rate. The species vanishing fastest are disproportionately the ones we haven't catalogued yet: small invertebrates, tropical fungi, deep-sea organisms in habitats we've barely surveyed.

You can't protect what you haven't found. It's a race against what scientists call "dark extinction"—species disappearing before anyone knows they existed.

The Surprising Speed-Up

But here's the plot twist: we're not falling behind. We're actually speeding up.

A December study in Science Advances by Wiens and colleagues found that between 2015 and 2020, scientists described more than 16,000 new species per year—the highest rate in the 270-year history of modern taxonomy. Fifteen percent of every species known to science has been discovered in just the past two decades.

This was supposed to go the other direction. Earlier research suggested species description peaked around 1900, when naturalists in pith helmets tramped through tropics shipping specimens back to European museums. The assumption was that the easy discoveries had been made—we were in the long tail of diminishing returns.

Wiens's data says otherwise. "Some scientists have suggested that the pace of new species descriptions has slowed down," he told ScienceDaily. "But our results show the opposite."

The DNA Revolution Changes Everything

The biggest game-changer is plummeting genome sequencing costs—from $95 million per human genome in 2001 to hundreds of dollars by the early 2020s. That's faster than Moore's Law for long stretches.

This cost drop made DNA barcoding cheap enough for widespread use, letting researchers distinguish species that look identical but are genetically distinct. Environmental DNA (eDNA) now detects species from trace genetic material—shed skin in a river, cellular fragments in soil. A single water sample can reveal dozens of species, including rare ones traditional surveys would miss entirely.

Then there's the citizen science explosion. iNaturalist, founded in 2008, has passed 200 million verifiable observations. Over 4 million people worldwide are photographing every spider, mushroom, and wildflower they encounter. In 2023, two Australian citizen scientists helped discover Inimia nat, an entirely new genus of mantis—the first of its subfamily named since before the moon landing.

Discoveries in Unexpected Places

We've also started looking where we'd never looked. The Ocean Census, launched in 2023, has identified 866 likely new marine species across 10 expeditions. A single month-long expedition off Chile may have turned up more than 100 new species: corals, glass sponges, squat lobsters.

In Laos, a zipline tour guide spotted what turned out to be a new dragon lizard genus. In Japan, undergraduate Yoshiki Ochiai found a new man-o'-war species on Gamo Beach—a popular surf spot—and brought the creature to the lab in a plastic bag.

Sometimes we even find species we'd thought were gone forever. Attenborough's long-beaked echidna, one of only five living egg-laying mammals, was rediscovered in 2023 after not being seen since 1961—captured on the last day of an Oxford expedition into Indonesia's Cyclops Mountains.

The Widening Gap

But discovery isn't protection—and the gap between naming a species and saving it is widening.

The proportion of threatened species among newly described ones has risen from 11.9 percent (for species described in the 18th century) to 30 percent today, projected to reach 47 percent by 2050. The pattern has become grimly routine: a species gets a name and a Red List designation almost simultaneously.

The Tapanuli orangutan, described in 2017, was listed critically endangered immediately with fewer than 800 individuals. Every new bird species described in Brazil's Atlantic Forest between 1980 and 2010 was already threatened. According to Kew Gardens, three in four undescribed plant species are estimated to be threatened with extinction before anyone even names them.

The IPBES estimates more than 500,000 species have too little habitat left for long-term survival—effectively dead species walking. Even as scientists describe new species at record rates, the tropical habitats where most undiscovered species live are being destroyed fastest.