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Aye-aye

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The aye-aye is a very unusual primate from the island of Madagascar.

Aye-aye at night in the wild in Madagascar
Aye-aye at night in the wild in Madagascar

It is the largest primate in the world that is nocturnal, meaning it is active at night. These animals spend most of their lives high in the trees. They are arboreal, which means they live in the forest canopy. During the day, they sleep in round nests made of twigs and leaves. They are solitary animals that live in their own home ranges.

Aye-Aye Daubentonia madagascariensis in Stockholm
Aye-Aye Daubentonia madagascariensis in Stockholm

Finding food is a very special thing that happens for an aye-aye. This way of hunting is called percussive foraging.

Gnawed limb, Daubentonia madagascariensis
Gnawed limb, Daubentonia madagascariensis

First, the aye-aye taps on a tree trunk very quickly. It can tap up to eight times every single second. It uses its ears to listen for an echo from hollow spots. These hollow spots often hold tasty grubs or larvae inside. Once it finds a spot, the aye-aye gnaws a hole in the wood. Finally, it uses a very thin middle finger to pull the food out.

Aye-Aye Daubentonia madagascariensis in Copenhagen (Left Hand)
Aye-Aye Daubentonia madagascariensis in Copenhagen (Left Hand)

Scientists have studied the aye-aye for a long time. The name for its group, Daubentonia, came from a French naturalist named Louis-Jean-Marie Daubenton. A student named Étienne Geoffroy Saint-Hilaire named it in 1795. Another person, Pierre Sonnerat, first used the name "aye-aye" in 1782. Some people think the name sounds like a Malagasy cry of surprise. Others think it might come from a Malagasy word that means "I don't know."

Aye-Aye Daubentonia madagascariensis in Stockholm
Aye-Aye Daubentonia madagascariensis in Stockholm

An adult aye-aye has many interesting physical traits. They have a head and body length of about 22 inches. Their tails are even longer than their bodies.

Aye-Aye Daubentonia madagascariensis in Copenhagen (Left Hand)
Aye-Aye Daubentonia madagascariensis in Copenhagen (Left Hand)

Their front teeth are like those of a rodent and grow all the time. The middle finger is very thin and has a special joint. This finger helps them reach into small holes to find insects. They also have a sixth digit called a pseudothumb to help them grip. Their ears have special ridges to help them hear sounds clearly.

We can learn a lot by comparing the aye-aye to other animals. In the forest, the aye-aye acts like a woodpecker. It finds food inside wood just like a woodpecker does. Its teeth are similar to a squirrel or a mouse. However, its head and eyes look more like a cat.

Gnawed limb, Daubentonia madagascariensis
Gnawed limb, Daubentonia madagascariensis

Sadly, the aye-aye is now listed as an endangered species. This is because forests are being lost and people sometimes kill them. We can learn how important they are by watching how they live.

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🖼️ Images & Media (8)
File:Aye-Aye Daubentonia madagascariensis in Stockholm.jpg
Aye-Aye Daubentonia madagascariensis in...
File:Aye-Aye Daubentonia madagascariensis in Copenhagen (Left Hand).jpg
Aye-Aye Daubentonia madagascariensis in...
Daubentonia madagascariensis 3d scan...
Daubentonia madagascariensis 3d scan...
File:Ayeaye, Daubentonia madagascariensis, Joseph Wolf.jpg
Ayeaye, Daubentonia madagascariensis,...
File:Gnawed limb, Daubentonia madagascariensis.jpg
Gnawed limb, Daubentonia madagascariensis.jpg
File:Aye-aye at night in the wild in Madagascar.jpg
Aye-aye at night in the wild in Madagascar.jpg
File:Daubentonia madagascariensis - dead 01.jpg
Daubentonia madagascariensis - dead 01.jpg
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