How To Tell Sex Of Western Grey Squirrel

How to Tell the Sex of a Western Grey Squirrel

If you’re unsure of the sex of your pet’s western grey squirrel, you may not know how to spot the difference between a male and a female. Luckily, there are several ways to determine the sex of a western grey squirrel. Below, we’ll discuss testicular regression, size, and color. You can also see whether the sex of your pet’s fur matches its markings on its body.


The mating behavior of the female western gray squirrel is unclear. Western gray squirrels are known to bite each other during breeding season, and have highly territorial behaviors. This species mates once a year, from December to June. The gestation period is approximately 43 days and the young are born without fur. The litter size ranges from three to five young. Baby western gray squirrels weigh about one ounce and are approximately one inch long. They become sexually mature when they reach around six months old.

The native range of the western gray squirrel in Washington state is very limited compared to the rest of its range. The species is found in only three isolated populations. In Washington, they inhabit transitional forests with mature Oregon white oak, ponderosa pine, and Douglas-fir. It also inhabits riparian areas with various tree species. The species is considered low-density, and the WDFW believes its population is not as diverse as it once was.

Testicular regression

The western gray squirrel is a threatened species in Western Washington and Oregon. The animal is known for its unique physical traits. The adult western grey squirrel has seven toes and nine plantar tubercles on each hind foot, and extra digits are articulated with supernumerary cuneiforms. This form of polydactylism is rare in wild adult rodents, and the western grey squirrel is associated with the Oregon white oak.

The testes start growing in late November and begin to descend into the scrotum. They are typically dark brown or black, and may be stained with urine. Male squirrels go through two periods of spermatogenesis. They breed throughout the year, and in a good mast year, they tend to have two litters. However, the testes in females do not retract into the scrotum.


The size of the western gray squirrel is usually between eighteen and twenty-four inches. It can weigh between twelve and thirty-two ounces. The fur of this species is silver gray with white undersides and a long, bushy tail. The tail is not tufted and measures between eighteen and twenty-one centimeters (four to seven inches). These animals shed their fur twice per year, during the late spring and fall molting seasons.

The Western gray is a woodland creature that needs a continuous stretch of mature oak trees. They are more likely to feed in an up-a-tree location than on the ground. In addition, they prefer fungi that grow underground. Western grays do not use fragmented habitats. They also prefer to stay in solitary burrows. Their diet includes pinecones, acorns, and seeds.


If you want to identify a particular gray squirrel, you can learn its sex by watching its mating ritual and chase. Male squirrels have different genitalia from females. You can even distinguish the two by the way their undersides look during breeding season. You can also look for the presence of testicles to determine the sex. This article provides information on how to tell the sex of a gray squirrel and the signs you should look for.

The western gray squirrel, Sciurus griseus, lives primarily in the western United States. They inhabit the mountainous regions of California, Oregon, and Washington. Their home ranges are between 0.5-7 hectares in size. Males have larger homes. The western grey squirrel weighs between 350 and 950 grams. They have large ears, but no tufts. They spend their time on the ground and in trees.


Despite the fact that they have the same name, how to tell the sex of a western gray squirrel can be tricky. The answer to this question depends on the species. Male gray squirrels are larger than females and weigh about one and a half pounds at maturity. They measure about 18 inches long and have large, bushy tails that are not much different from each other. A male gray squirrel usually mates with only one female at a time.

Eastern gray squirrels have predominantly gray fur, but can have a brownish hue on their backs. They also have large bushy tails, and are often found in urban settings. Interestingly, you can also find the melanistic form, which is almost entirely black and is dominant in certain geographic areas and populations. The black tails and undersides of these squirrels are genetic differences between the two sexes.

How can you tell the difference between a male and female western grey squirrel?

Male and female western grey squirrels can be told apart by their physical appearance.

Male western grey squirrels are typically larger than females and have more muscular build.

Additionally males usually have larger tails and more prominent tufts of fur on their ears.

How can you tell the difference between a male and female western grey squirrel by their behavior?

Male and female western grey squirrels can also be told apart by their behavior.

Males are typically more aggressive than females and are more likely to engage in physical confrontations.

Females are more likely to be shy and timid and are less likely to approach humans.

Additionally males tend to mark their territory more often than females.

What are some other ways to tell the difference between a male and female western grey squirrel?

Another way to tell the difference between a male and female western grey squirrel is by their reproductive organs.

Male squirrels have a penis while female squirrels have a vagina.

Do western grey squirrels mate for life?

No western grey squirrels do not mate for life.

They typically mate for a single season and will often mate with multiple partners.

How often do western grey squirrels mate?

Western grey squirrels typically mate once per year though they may mate more frequently if they do not produce a litter.

How many offspring do western grey squirrels typically have?

Western grey squirrels typically have two to four offspring per litter.

How can you tell if a western grey squirrel is pregnant?

You can usually tell if a western grey squirrel is pregnant by her enlarged nipples and abdomen.

Additionally pregnant females will often build nests in preparation for their young.

How long is the gestation period for a western grey squirrel?

The gestation period for a western grey squirrel is approximately 38 days.

When are western grey squirrels born?

Western grey squirrels are typically born in late spring or early summer.

How long does it take for western grey squirrels to reach sexual maturity?

Western grey squirrels typically reach sexual maturity at around 10 months of age.

How long do western grey squirrels live?

Western grey squirrels typically live for around 10 years in the wild.

What do western grey squirrels eat?

Western grey squirrels are omnivorous and their diet consists of both plant and animal matter.

They typically eat nuts seeds fruits and insects.

Do western grey squirrels hibernate?

No western grey squirrels do not hibernate.

They are active year-round.

Do western grey squirrels carry any diseases?

Yes western grey squirrels can carry diseases such as rabies and typhus.

Are western grey squirrels considered pests?

Yes western grey squirrels are considered pests in many areas.

They are known to damage crops and property and can also be a nuisance to homeowners.

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