To Save Lemurs, They’ve Developed Lemur Facial Recognition Software

Instead of using tags or tracking collars, researchers are creating a database filled with lemurs’ faces that they’ll use to monitor large groups of the threatened species in a Madagascar rainforest.

To Save Lemurs, They’ve Developed Lemur Facial Recognition Software
[Photo: Mint Images/Frans Lanting/Getty Images] [Photo: Mint Images/Frans Lanting/Getty Images]

If facial recognition software for humans can be creepy–one Russian app, for example, makes it possible for a stranger to take your photo on the street and then stalk you online–the same technology adapted for animals could help protect endangered species.


LemurFaceID, new software developed for lemur research, can identify an individual lemur with 98.7% accuracy, making it easier to track a population over a long time and plan for conservation.

[Image: via LemurFaceID]

Until now, researchers studying red-bellied lemurs in a rainforest in Madagascar have relied on their own ability to recognize a particular lemur. “Some have individual scars; some have eyebrows that look like they’re scowling,” says Stacey Tecot, an anthropologist from the University of Arizona who has spent the last 17 years studying lemurs. “But visibility in the forest is pretty difficult.”

It takes time to train new researchers to identify individual lemurs in the field, and it’s difficult to keep track of those individuals over time. (It’s not known how long red-bellied lemurs live, but they may live into their twenties or thirties.) It’s also difficult to track populations over large areas.

The other alternative–capturing animals and adding tags or tracking collars–can be stressful and expensive. Tags and collars also potentially injure wildlife, especially tree dwellers like lemurs. For species that are already threatened or endangered, it’s one more threat.

Facial recognition software, by contrast, can identify an individual lemur almost immediately, and all that’s required is a photo. Tecot was part of a team of two other lemur researchers and four computer scientists, from several universities, who developed the software. While facial recognition for humans focuses on the geometry of facial features, such as the distance between eyes, the system for lemurs looks for unique patterns in the animal’s fur.

Other researchers are using similar software to identify and track zebras or tigers based on unique patterns in their stripes or identify chimps by their faces. In Tanzania, researchers using recognition software for giraffes have been able to stop tagging animals, while studying a larger population than before.


For lemurs, the new software will make it possible to better understand their lives. “For the answers to really interesting evolutionary questions, or questions about population dynamics that are important for conservation efforts, I think it’s really a requirement that this is done,” says Tecot. “We couldn’t do it otherwise.”

Along with the majority of other lemur species in Madagascar, red-bellied lemurs are listed as “threatened”–at risk from illegal logging and mining as well as the illegal pet trade. Facial recognition software could help law enforcement identify an animal sold as a pet; it could also help conservation experts plan actions, and help increase support for conservation in general.

As people document their visits to Madagascar’s Ranomafana National Park, where the researchers work, their photographs could help grow the researchers’ database and improve the facial recognition software. And, in turn, the software could connect visitors to the animals by telling them the name of the lemur they just put on Instagram.

“We think one of the things that can improve conservation is feeling more connected with the park and with the animals–that’s true of tourists, guides, and locals, anyone who goes into the park–so there’s an emotional connection,” says Tecot. “People can go into the park, snap a photo . . . that can create a more personal experience so people know who they’re taking a picture of and they get a little bit of information about them.”

About the author

Adele Peters is a staff writer at Fast Company who focuses on solutions to some of the world's largest problems, from climate change to homelessness. Previously, she worked with GOOD, BioLite, and the Sustainable Products and Solutions program at UC Berkeley.