8 animals once declared extinct that were later rediscovered alive

Out in the wild, certainty has a way of falling apart. Scientists can search a region for decades, collect every record available, and still miss a species that’s quietly hanging on in some overlooked valley or patch of forest. When an animal disappears for long enough without confirmed sightings, it sometimes gets labeled extinct. But every now and then, the wilderness pushes back on that assumption.

Over the years, a handful of species have resurfaced after decades—or even more than a century—without proof they were still alive. In most cases the rediscovery happened in remote terrain where people rarely go. For biologists and conservationists, those moments are rare and powerful reminders that nature still has plenty of secrets left. Here are several animals that were once written off as gone, only to show up alive again.

Takahe

If you had been living in New Zealand in the late 1800s, you might have heard stories about a large, flightless bird wandering the alpine grasslands. That bird was the takahe. Early European settlers saw a few, but by the end of the 19th century the species had vanished from sight. After decades without confirmed sightings, scientists assumed the bird had disappeared entirely.

Then in 1948, a small government expedition searching remote valleys in the Murchison Mountains stumbled onto a living population. The birds had been surviving quietly in rugged terrain that few people ever visited. Today the species is still endangered, but careful conservation work has kept the population growing. The rediscovery remains one of the most surprising wildlife finds in modern history.

La Palma Giant Lizard

The La Palma giant lizard lived in the Canary Islands and was known mostly from fossil remains by the late 20th century. For decades scientists believed the species had died out long ago, likely wiped out by habitat loss and introduced predators.

Then in 2007, researchers working along steep coastal cliffs on the island of La Palma spotted a small surviving population. The lizards had managed to persist in rocky areas that were difficult for predators—and humans—to reach. Biologists quickly launched a breeding and protection program to prevent the species from disappearing for good. The rediscovery showed how animals can hold on in isolated pockets even when the rest of their range has vanished.

Somali Sengi

The Somali sengi, sometimes called an elephant shrew, had not been confirmed in the wild since the 1960s. For decades researchers searched across the Horn of Africa without success. Eventually many experts believed the small insect-eating mammal had likely disappeared.

In 2020, a team of scientists working in Djibouti set traps while surveying local wildlife. To their surprise, several sengis showed up in the traps. The animals had been living in rocky desert habitats all along, largely unnoticed by science. Local communities were already familiar with them, which helped researchers confirm the species’ identity. The rediscovery added an entirely new chapter to the animal’s story after nearly sixty years without proof it still existed.

Voeltzkow’s Chameleon

Voeltzkow’s chameleon had been known from a few specimens collected in Madagascar more than a century ago. After that, the species seemed to vanish completely. For over one hundred years no scientist documented a living individual, and many assumed the reptile had disappeared.

In 2018, researchers exploring forests in northwestern Madagascar located several living populations. The chameleon turned out to be a striking species, with males showing bright colors during the breeding season. Because the animals appear only during a short window of the year, they were easy to miss during earlier surveys. Their rediscovery highlighted how seasonal behavior can keep a species hidden even when scientists are actively searching.

Bermuda Petrel

The Bermuda petrel, also known as the cahow, was once believed to be extinct for more than three centuries. The seabird was heavily hunted by early sailors in the 1600s, and its nesting colonies disappeared from the islands where they once thrived.

Then in 1951, a small group of researchers located a handful of surviving birds nesting on remote rocky islets in Bermuda. Fewer than twenty pairs remained at the time. Conservationists stepped in quickly, protecting nesting sites and rebuilding habitat. The population has slowly increased over the decades, though the bird is still considered endangered. Finding living cahows after more than 300 years remains one of the most dramatic wildlife rediscoveries on record.

Wallace’s Giant Bee

Wallace’s giant bee is the largest bee species on Earth, and for a long time it seemed to have vanished completely. The insect was first documented in 1858 in Indonesia, but after that it disappeared from scientific records for more than a century.

Researchers rediscovered the bee in 1981 while surveying forested islands in the region. Then it vanished again from confirmed sightings until 2019, when a wildlife photographer located a living individual inside a termite mound. The bee’s rarity and remote habitat make encounters extremely uncommon. Even today, scientists know relatively little about its behavior in the wild.

New Guinea Singing Dog

The New Guinea singing dog was known for its unusual vocalizations that sound more like a howl mixed with a yodel. For years the species survived mainly in captivity, and many experts believed the wild population had disappeared entirely.

In 2016, researchers studying remote highland regions of New Guinea documented wild dogs with genetics matching the original singing dog lineage. These animals had been living in rugged mountain terrain largely isolated from human settlements. The discovery gave conservationists new hope that the species might still maintain a natural population in the wild.

Lord Howe Island Stick Insect

For decades the Lord Howe Island stick insect was considered one of the clearest examples of extinction. The large insect once lived on Lord Howe Island in the Pacific, but invasive rats wiped out the population in the early 20th century.

In 2001, scientists exploring Ball’s Pyramid, a steep volcanic rock about 14 miles from the island, discovered a small surviving colony clinging to life under a single shrub. Only a couple dozen insects were found. Since then, breeding programs have raised thousands in captivity with the goal of eventually reintroducing them to their original home once the island ecosystem is restored. The discovery proved that even species thought completely gone may still be hanging on somewhere unexpected.