Just when you think you’ve seen every type of animal under the sun, some crazy messed-up creature emerges from the depths to make you go, “What in the world is that?”

In today’s edition of “How does this thing exist and how did I not know about it,” we’ll go over the colugo, a nocturnal, tree-dwelling mammal that somehow manages to be adorable and frightening at the same time. This little-known animal is native to Southeast Asia and is completely harmless (to humans). To help you get to know the colugo better, we’ll go over 5 fun facts about this crazy little critter.

1. There Are Two Species Of Colugos

There are only two different species of colugos. The first is the Sunda flying lemur (Galeopterus variegatus), which is found in greater Southeast Asia in countries like Thailand, Malaysia, and Indonesia. The second is the Philippine flying lemur (Cynocephalus volans), which is found only in the Philippines. While the two species vary in terms of size, coloring, and location, they share most other physical qualities.

2. They Can’t Fly, And They Aren’t Lemurs

Despite being called flying lemurs, colugos are incapable of flight. However, they are excellent gliders thanks to a membrane that connects all four of their limbs and their tail. Similar to a flying squirrel, this membrane allows them to glide up to 70 meters as they jump between trees. Colugos are also not lemurs, although they do look a lot alike. Colugos are actually closer in relation to both tree shrews and primates.

3. Their Teeth Look Like Combs

One of the most notable aspects of the colugo is its teeth. Their incisors have up to 20 tines per tooth, making them perfect for cutting up leaves and grooming themselves. Although their teeth might look a bit weird, they are far from the only animals to have comb-like teeth. Other animals with toothcombs include tree shrews, lemurs, and even some African antelopes.

4. They Can See Incredibly Well

Those big, adorable eyes aren’t just for show. Colugos are nocturnal, which means their eyesight has evolved to allow them to see during the nighttime. They usually spend their time during the day sleeping or resting in tree hollows or on tree branches. Then, at night, they use their powerful night vision to traverse the canopy looking for food. Thanks to their gliding ability, they can easily move from tree to tree to find food and avoid predators.

5. They Are Solitary And Territorial

The colugo is not a social animal. Adult colugos usually only come together to procreate, although they are known to occasionally share sleeping sites during the daytime. They are also territorial and will defend their territory against colugos of the opposite sex. Despite their social nature, they have developed an interesting form of communication involving hisses and clicks that allows mothers to communicate with their babies and mates to find each other.

Once you get to know the colugo, you’ll learn that there’s a lot more to these little guys than meets the eye. Because they are nocturnal, shy animals, there’s still plenty we don’t know about them. But with their giant eyes and their little webbed feet, they sure do make an interesting sight.