Japanese Flying Squirrel: Diet, Behavior, Habitat & More Info

The Japanese flying squirrel, also known as Pteromys momonga, is a captivating creature that fascinates researchers and nature enthusiasts with its remarkable abilities. This small mammal, found in the forests of Japan, has the unique talent of gliding through the air, defying gravity with grace and agility. With its endearing appearance and fascinating behavior, the Japanese flying squirrel has become a subject of great interest and admiration. In this article, we will delve into the world of this extraordinary creature, exploring its physical characteristics, habitat, behavior, and conservation status. Prepare to be amazed by the wonders of the Japanese flying squirrel!

Japanese Flying Squirrel: Diet, Behavior, Habitat & More Info

Physical Characteristics

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The Japanese flying squirrel has several distinctive physical characteristics that contribute to its remarkable gliding abilities and overall appearance. Let’s explore these features in detail:

Size and Appearance

This squirrel is a small mammal, measuring approximately 20 to 25 cm in length, excluding its tail. It has a plump and rounded body covered in dense fur that serves as insulation against the cold. The fur of this squirrel varies in color, ranging from shades of brown to gray on the upper side and creamy white on the underside. This coloration helps them to blend seamlessly with the trees and vegetation in their forest habitat.

One of the most striking features of the flying squirrel is its large, expressive eyes. These round, dark eyes provide excellent night vision enabling them to navigate effectively in low-light conditions. Their eyes are located on the front of their head, providing them with binocular vision, which aids in accurately gauging distances when gliding through the forest canopy.

Habitat and Distribution

This squirrel is native to the forests of Japan, where it thrives in various woodland habitats. Let’s take a closer look at the habitat and distribution of this creature:

Forest Ecosystems

The Japanese flying squirrel is predominantly found in deciduous and mixed forests, like coniferous forests with dense vegetation. These forests provide the ideal environment for their arboreal lifestyle, offering an abundance of trees for shelter and food sources.

The diverse range of tree species, including oak, beech, maple, and fir, contribute to the rich biodiversity of their habitat.

This squirrel prefers areas with a dense canopy cover. They also prefer habitats where trees are very close, allowing them to move seamlessly between them and facilitating their gliding activities.

Geographic Range

These squirrels are endemic to Japan, and their distribution extends throughout the country’s islands. They live in various regions, including Honshu, Shikoku, Kyushu, and parts of Hokkaido. Their presence is more concentrated in certain areas, from lowlands to mountainous regions.

Nocturnal Lifestyle

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The Japanese flying squirrel leads a fascinating and active life under the cover of night. As a nocturnal creature, it has different adaptations and behaviors that allow it to thrive in the darkness of its forest habitat.

Adaptations for Nighttime Activities

This squirrel has several adaptations that enable it to navigate and survive in low-light conditions. They rely on their acute hearing to detect sounds at night. Their ears are finely tuned to pick up subtle cues, such as the rustling of leaves or the movements of potential predators or prey. Their sense of hearing helps to locate food sources and avoid potential dangers.

Diet of Japanese flying squirrel

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The diet of this squirrel consists of plant materials, including tree bark, buds, leaves, fruits, and nuts. They have a particular affinity for seeds, which provide them with essential nutrients and energy.

Tree Bark

Bark serves as an essential food source when other food options are scarce. By gnawing on tree bark, they can access the inner layers that contain vital nutrients.

Buds and Leaves

Buds and leaves play a significant role in the squirrel’s diet. They consume nutrient-rich buds, which provide essential vitamins and minerals.


These squirrels relish various fruits, including berries and other fleshy fruits. These fruits provide nourishment & also help as a source of hydration due to the high water content of squirrels.

Nuts and Seeds

Nuts and seeds hold a special place in the diet of squirrels. They are adept at locating and consuming various nuts and seeds within their forest habitat. These nutrient-food items offer a rich energy source, & they often store for later consumption.

Life Cycle of the Japanese Flying Squirrel

The life cycle of these squirrels encompasses various stages of growth. Let’s explore some aspects of their life cycle:

Mating and Gestation

The mating season for Japanese flying squirrels typically occurs from May to July. After successful mating, the female undergoes a gestation period of approximately 4-weeks. During gestation, the female squirrels construct a nest in the hollow of a tree or a tree cavity. These nests provide a secure environment for newborn baby squirrels.

Birth and Early Stage

The female squirrel gives birth to a litter of typically one to three young, known as pups. The newborn pups are blind, hairless, and entirely dependent on their mother for nourishment and care.

The young squirrels remain within the nest for the first few weeks of their lives. As they grow, their eyes open, and they develop fur. Around 8 to 10 weeks of age, the young squirrels become more active and begin to venture outside the nest, gradually exploring their surroundings.

Juvenile Stage

During the juvenile stage, the baby squirrels continue to receive guidance from their mother. They refine their gliding skills through playful activities, practicing short glides between trees. This period of exploration and skill development prepares them for an independent life.

The young squirrels become fully independent around 3 to 4 months of age, & leave the nest to establish their territories.

Threats and Conservation of the Japanese Flying Squirrel

These squirrels face various threats to their population and habitat. Let’s examine some threats that they encounter and the measures in place to protect these enchanting creatures:

Habitat Loss

One of the primary threats to this squirrel is habitat loss and fragmentation. Deforestation, urbanization, and the expansion of human activities have destroyed their forested habitats. As a result, the available suitable habitats for these squirrels have been reduced.


Predation is another threat to the Japanese squirrel. Natural predators, including owls, snakes, and larger mammalian predators, pose a risk to their survival. Their population decreased, especially in areas where their natural predators thrive.

Conservation Efforts

Efforts are underway to conserve and protect the flying squirrel and its habitat. Conservation organizations are working to preserve existing forested areas and protect the remaining habitats of the squirrel.



Where can I buy a Japanese dwarf flying squirrel?

The purchase of Japanese dwarf flying squirrels is illegal in Japan & other countries due to their protected status and specific habitat needs. It is essential to consult local wildlife authorities, licensed breeders, or exotic animal dealers to inquire about any legal and ethical options for obtaining this squirrel.

Can I have a Japanese flying squirrel as a pet?

It is generally not recommended to keep them as pets, while they appear cute as a pet due to their adorable appearance. These squirrels are wild animals with specific habitats and dietary requirements that are challenging to replicate in a domestic setting.

How big are Japanese flying squirrels?

Japanese flying squirrels are relatively small in size. On average, they can grow up to 14 to 20 cm (5.5 to 7.8 inches) in length. The tail can measure approximately 10 to 14 cm (4 to 7.8 inches). They typically weigh between 150 to 200 grams (5 to 7 ounces).

How to say flying squirrel in Japanese?

In Japanese, the term for flying squirrel is “momi” or “momonga.” These words are used to refer to various species of flying squirrels, including the Japanese dwarf flying squirrel (Pteromys momonga), which is native to Japan. The name “momonga” is derived from the sound they make, resembling “momon” or “momo.”

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