The Great Gorilla Count

Research center staff check on certain groups of mountain gorillas every day. The center is run by the Dian Fossey Gorilla Fund, which continues research started by Fossey in 1967. (See "Who Is Dian Fossey?" below.) The work is the longest-running study of gorillas in the world.

Some of the gorilla families are comfortable around people. But others run away as soon as they hear people nearby. So instead of trying to spot every gorilla, Eckardt’s teams look for signs that gorillas have moved through the forest. One clue: a path the big apes have cleared as they eat plants. Following these paths leads researchers to the temporary nests that gorillas sleep in each night.

Research center staff check on certain groups of mountain gorillas every day. The center is run by the Dian Fossey Gorilla Fund. The fund continues research started by Fossey in 1967. (See "Who Is Dian Fossey?" below.) The work is the longest-running study of gorillas in the world.

Some of the gorilla families are comfortable around people. But others run away when they hear people nearby. Eckardt’s teams don’t try to spot every gorilla. Instead, they look for signs of gorilla movement. The big apes eat plants in the forest. As they eat, they clear paths. Researchers follow these paths. The paths lead to temporary nests where gorillas sleep each night.

When a team finds a nest, they check it for gorilla droppings. They collect the dung to analyze later in a lab. The dung contains DNA that scientists use to identify which gorilla it came from. That way they can make sure they aren’t counting the same gorilla twice.

When a team finds a nest, they check it for gorilla droppings. They collect the dung. They analyze it in a lab. The dung contains DNA. Scientists use the DNA to identify which gorilla the dung came from. They make sure they aren’t counting the same gorilla twice.

Between 2015 and 2016, Eckardt’s teams spent six months surveying the gorillas’ habitat. It took another two years to analyze the dung samples they had found. Finally, the results came in: They had identified 604 mountain gorillas, the most ever counted in the area! 

“There’s strong evidence that the population is growing,” says Eckardt. That makes mountain gorillas the only great apes in the world whose numbers are actually going up. It’s also a good sign that conservation efforts are paying off. 

Eckardt’s teams spent six months surveying the gorillas’ habitat. It took another two years to analyze the dung samples they had found. Finally, the results came in. The teams had identified 604 mountain gorillas. That was the most ever counted in the area!

There’s strong evidence that the population is growing,” says Eckardt. That makes mountain gorillas the only great apes in the world whose numbers are going up. It’s also a good sign that conservation efforts are paying off. But mountain gorillas still face risks, says Eckardt. Poachers set up snares to hunt animals such as antelope. Gorillas can also be killed or injured by these traps. Every year, Eckardt’s teams find and destroy hundreds of snares.

But mountain gorillas still face risks, says Eckardt. Every year, her teams find and destroy hundreds of snares that poachers set to hunt animals such as antelope. Gorillas can also be killed or injured by these traps.

A changing climate could affect the gorillas’ mountain habitat too. That’s one reason why it’s important to keep studying and counting the great apes, says Eckardt.

“It just doesn’t get boring,” she says. “We always learn something new.”

“There’s strong evidence that the population is growing,” says Eckardt. That makes mountain gorillas the only great apes in the world whose numbers are going up. It’s also a good sign that conservation efforts are paying off. But mountain gorillas still face risks, says Eckardt. Poachers set up snares to hunt animals such as antelope. Gorillas can also be killed or injured by these traps. Every year, Eckardt’s teams find and destroy hundreds of snares.

A changing climate could affect the gorillas’ mountain habitat too. That’s one reason why it’s important to keep studying and counting the great apes, says Eckardt.

“It just doesn’t get boring,” she says. “We always learn something new.”