Now that the trees have shed their leaves, it's very easy to spot a bunch of leaves up in the branches.

Most of us assume it's a bird's nest. Why wouldn't we?

By the way, it very well may be. However, it could be something completely different.

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It may not be a nest at all. It could be a drey.

What is a drey?

Simply put, it's a squirrel nest.

According to the Massachusettes Audobon Society, Eastern Gray squirrels, Red squirrels, and northern and southern flying squirrels all build these dreys.

They differ from bird's nests in a couple of ways.

Dreys are almost always at least 20 feet off the ground for the best protection from predators.

READ MORE: If You Smell Cucumber In Your Home, Leave Immediately

Also, squirrel dreys are amazingly constructed with soft materials like moss or pine needles.

Isn't it fascinating that so many creatures instinctively know how to build these creations?

It's worth mentioning that dreys are way bigger than your average bird's nest.

They can be a foot to two feet wide.

One will find a squirrel drey near the trunk of a tree.

This part is extra fascinating.

The reasoning for the positioning is so squirrels can enter the drey through the trunk. Pretty cool, right?

In the colder months, some squirrels will use the same tree for shelter, just inside the tree.

Will squirrels use an existing bird's nest that has been abandoned?

In some cases, yes.

They will put on additions to the house if you will if the location is suitable.

So, look up. If you see what looks to be a giant bird's nest, it may be a squirrel drey.

These animals are actually banned here.

LOOK: Here are the pets banned in each state

Because the regulation of exotic animals is left to states, some organizations, including The Humane Society of the United States, advocate for federal, standardized legislation that would ban owning large cats, bears, primates, and large poisonous snakes as pets.

Read on to see which pets are banned in your home state, as well as across the nation.

Gallery Credit: Elena Kadvany

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