About east GraysEastern Gray Squirrels space the predominant squirrels on UW campus. If you check out a squirrel ~ above campus, you deserve to safely i think its an east Gray. They room tree dwelling rodents that the family members Sciurus. InWashington, they room an invasive varieties that were presented in 1925. Part scientists think that they may be the leading reason to the loss of our indigenous Western Gray squirrels on the UW campus and in west Washington. They room an abundant, prolific, and also adaptable species. Though they are native to the east coast and midwest, these squirrels execute quite fine on the west coast and have spread out rapidly.

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Source– discoverlife.orgDescription
Like the name suggests, east Grays are mostly gray in color, though they also have a mixture of reddish browns. They have actually white undersides and also large, bushy tails. They deserve to be from 23 to 30 centimeters in length and also weigh from 400 come 600 grams. Generally, lock are about the dimension of small cat or kitten. That is straightforward to phone call them except their aboriginal Washington cousin, the western Gray. Our indigenous squirrels space solidly gray in color, doing not have the reddish browns that Eastern Grays have. Also, as soon as seen side by side, western Grays are much larger and also chunkier 보다 their slender, smaller sized cousins.How come Tell lock ApartGender - You can distinguish between males and also females by their genitalia. Indigenous a distance, males and females may appear to be the same. However, during breeding season, as soon as you check out their undersides, you can tell them apart. If friend can"t see anything, the squirrel is most most likely female. If you view testicles, that is a male.
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above left: masculine during breeding season (http://angels-view.civicpride-kusatsu.net.com/2009/01/eastern-gray-squirrel-sciurus.html)Above right: nursing woman (http://www.flickr.com/photos/mansony/1347650595/)Their sex is most noticeable during reproduction season, once you have the right to see male squirrels" testicles and also females have actually prominent nipples through which come feed their babies. Throughout the reproduction seasons, indigenous December come January, and May to June, if you find a squirrel without testicles, that is certainly a female. Throughout the non-breeding seasons, unless you space able to feeling around, the gender can go either way. Once it isn"t reproduction season, males carry their testicles inside your bodies. As soon as it is reproduction season, your testicles enlarge and become exposed.Age
- You have the right to tell older 설 설 from younger squirrels by your tails. Adolescent squirrels have furled tails till they room adults. Newborn squirrels room born pink v virtually no hair. They are helpless and also can neither see nor hear. During the very first 2 main of life, baby squirrels" ears begin to open and also they begin to revolve grayish where hair starts to come in. A squirrel will start to open his eyes and also will be completely furred in ~ 4 come 5 weeks old, at which allude they no much longer need supplemental heat. Native weeks 6-9, the squirrel is quiet a baby needing aid from the mother, but learning come socialize and also play v litter mates while additionally being maybe to now eat solid food. From weeks 10-12, the young squirrel starts come look like a small adult (about 3/4 the size). After week 12, the squirrel looks much like an adult. After mainly 12, the is harder come tell exactly how old the squirrel is until it is a senior, in ~ which allude the squirrel will begin to gain white fur about its eyes and nose, describe old age. In the wild, most squirrels don"t live past 1 year because of the harsh conditions, yet can live up to around 8 years. In captivity, squirrels deserve to live from around 10 come even twenty years on average.For in-depth information on a baby squirrels" adorable first weeks, click the following link!http://squirrelrefuge.org/squirrel_refuge_web_site_005.htmHabitatEastern Gray Squirrels develop nests, dubbed "dreys," in the forks or tops of trees. They construct these swarms primarily from dry leaves and twigs. To the untrained eye, this dreys might look lot like birds" nests.
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Source- Palmiped ~ above WikipediaEastern Gray 설 설 may also make dens indigenous tree holes. They line these dens v mosses, grasses, and feathers to provide insulation and also prevent warm loss.
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Source - animaldiversity.ummz.umich.edu
Breeding seasons for eastern Grays is native December toJanuary and also May come June. The an initial litter is born from February to March, andthe 2nd from may to June. During breeding season, the males follow a femalearound because that days before she is also able to breed. The female emits a odor thatcan lure males from end a kilometre away. Over there is just a quick approximate8 hour duration when a mrs squirrel is in estrus and also is able to breed. Whenthe dominant male wins the end over the less leading males, the pair enter abrief courtship before the mrs enters estrus and they mate. Males have norole in the rearing process, it is the mommy who takes care of the babies byherself. The gestation duration is around 44 days and the litter size is usually2-6, though deserve to be as high as 8. Young squirrels room weaned in ~ 7 weeks old andleave the swarm at 10 weeks. Leading young males leaving the nest early come findterritory, and it is not unexplained for young females to stay with their motherslonger.

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male squirrel chasing female -http://www.sciuridae.org/Sciurus%20carolinensis/reproduction%20-%20pursuit.htmlbaby squirrel -http://www.dominionpaper.ca/articles/3721Diet
The east Gray squirrel"s diet is composed of acorns,berries, bird eggs, bulbs, buds, flowers, fruit, bark, insects, mushrooms,fungi, nuts, pine tree seeds, roots, seeds, vegetables, and also sometimes nestlingbirds. East grays are often seen in urban areas and love to steal food frompeople"s bird feeders. The average squirrel needs to eat around a pound of fooda mainly to preserve an active life.
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Behavior

Like all tree squirrels, east Grays carry out not hibernate andare active throughout the entire year. Usually, wild east Gray squirrels arewary and also cautious of human being presence, however, the squirrels of the UW arevisibly different. They room obviously much an ext accustomed come humans and areknown to even come up to people and take food from their hands. Squirrelscommunicate with each various other through a collection of chirps. This included to tailgestures type the basis because that squirrel communication. When a squirrel sensesdanger, its very first instinct is to was standing motionless. If it is maybe to, that willclimb up the nearest tree. If that is in a tree as soon as sensing danger, the squirrelwill circle the tree and also press its body close come the bark.above picture -http://blog.nwf.org/2012/04/what-a-squirrel-wants/
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Cat vs. East Gray, courtesy of mock Tewksbury
Written by Olisavia, final photo added by Tessa