Simple facts
Name: aye-yee (daubentonia madagascaliensis)
Where it lives: Madagascar
What it eats: seeds, nuts, fruits, nectar, plant matter, fungi, insect larvae, honey
This lemur, from Madagascar, looks like a strange mix of several animals. It has round owl eyes, bat ears, rodent-like teeth that do not stop growing, and a bushy tail that is longer than its body.
IAIDS is the world’s largest nocturnal lemur, weighing approximately 4 pounds (1.8 kilograms) and reaches up to 24 inches (60 cm) from the nose to the tip of the tail. Young aye-ayes have a silver front with stripes on their backs, but as they grow into adults, their thick fur turns to white brown. During the day they sleep in spherical nests made from leaves and branches, but at night they roam the treetops in search of food.
The aye-ayes have a very long, boned middle finger. As the animal moves along tree branches at night, it rapidly beats the wood with its long fingers, hearing subtle changes in echo indicating the presence of a hollow chamber in which wooden insect larvae are hidden. When there is a glove, Aiei uses her teeth to make a small hole in the bark and insert the thin fingers to fish for food. These long, middle fingers have a joint of balls and sockets that gives the sheep a wide range of movement to reach their prey.
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However, biologists have also discovered that lemurs use these elongated fingers for another task: nose picking. In a 2022 paper published in the Journal of Zoology, researchers explained how Aye-ayes reached the back of their throat through their nose, licking the mucus they had gathered. The team noted that lemurs could be attracted to the “texture, crispy and salty” taste of mucus.
Like rodents, aye-ayes continuously grow incisors. The upper and lower teeth do not stop growing, but are slurped with trees, bark and nuts they bite.
In Malagascar folklore, aye-ayes is considered a precursor to death, and some believe that if aye-aee is pointing your finger at you, it is a death sentence. Because of these superstitions, aye-ayes are sometimes killed in sight, contributing to the decline of their population. Once listed as extinct, they were rediscovered in the wild in the 1950s, but they are still one on the verge of extinction.
To protect themselves from predators, aye-ayes rely primarily on stealth and camouflage. Their dark fur helps to blend in with the nighttime shadows of the rainforest. Their large and sensitive ears allow them to detect slight sounds in the leaves. This is an important ability to avoid predators like fossas (cryptoprocta ferox), a carnivorous mammal endemic to Madagascar.
When threatened, aye-ayes may freeze in place, relying on silence and silence to avoid detection. They are also extremely agile and can quickly climb and climb over dense forest canopies to escape danger.
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