Photo of a tortoise walking on the ground

Galápagos Conservancy

Creature Comebacks

These long-lost animals were recently found. How many others are waiting to be rediscovered?

Scientists around the world are on the hunt. They’re combing through forests, inspecting lakes, and searching islands. Their mission? To find animals and plants that experts haven’t seen in the wild in at least a decade. Some of the species have been missing for more than 100 years. Scientists fear that many of them have gone extinct. 

In 2017, a conservation group called Re:wild launched the Search for Lost Species. The group focused on finding 25 missing plants and animals. So far, eight have been rediscovered! 

“To find so many in just a couple of years is really exciting and gives us hope,” says Barney Long, a scientist at Re:wild.

But the search is far from over. Re:wild has worked with other conservation groups to identify more than 2,200 lost species. Many of them are considered critically endangered. Long says the first step in protecting a species is finding it.

“If we don’t know where they are, we don’t know what their threats are,” he explains. “And we don’t know the solution to their conservation.”

Here’s a look at how scientists found three missing animals—and what happens next.

Voeltzkow’s Chameleon

Year Found: 2018

Years Lost: 105

© Thorsten Negro/imageBROKER/Biosphoto

The island nation of Madagascar is home to nearly half the world’s chameleon species. But one type, the Voeltzkow’s (VOHLTZ-kouz) chameleon, hadn’t been seen for more than a century. Scientists feared that it had died out because of deforestation and other threats.

In 2018, researchers set out to look for the elusive chameleon. They had flashlights and headlamps to help them see at night. On the sixth day of the search, a local guide spotted one in a hotel garden. Eventually, the team found three males and 15 brightly colored females. 

Scientists know very little about the species. They want to learn everything they can in hopes of saving it.

Fernandina Giant Tortoise 

Year Found: 2019

Years Lost: 113

Galápagos Conservancy

More than a dozen giant tortoise species live on the Galápagos Islands in the Pacific Ocean. For decades, scientists worried that a tortoise found only on the island of Fernandina had completely died out. People had hunted the huge reptiles for their meat. Rats, pigs, and dogs—all of which eat tortoise eggs and hatchlings—are still a threat.

In February 2019, experts on Fernandina found a clue that the species might still be alive—its poop! Soon they spotted a female giant tortoise resting in the bushes nearby. The tortoise, nicknamed Fernanda, was taken to a breeding center so the team won’t lose track of her. Experts think she’s at least 50 years old. (Many giant tortoises live more than 100 years.)

Scientists hope to find more giant tortoises on Fernandina so they can start a breeding program to help the species recover.

Silver-Backed Chevrotain

Year Found: 2019

Years Lost: 29

Global Wildlife Conservation

These small deerlike animals live in Vietnam, a country in Asia. Hunters there illegally set traps to catch and kill animals for their meat. Silver-backed chevrotains (SHEV-ruh-taynz) were often the victims. The last recorded sighting of one was in 1990. 

The missing mammals were found by using a different type of trap: a camera trap. Sensors trigger the camera to take a photo when an animal moves past it. In 2019, experts announced that the cameras had snapped hundreds of photos of the “lost” chevrotains. 

Experts are using the images to learn more about the species, which is also known as the Vietnamese mouse-deer. The researchers’ goal is to persuade local hunters to stop setting the traps that kill the animals. 

1. What does the author mean when she writes that “the search is far from over”?

2. What threats have the animals described in the article faced?

3. What is a camera trap, according to the article?

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