If you really want to see huge squirrels check out a US college campus. They're so fat!

We have different colored squirrels in some regions.

https://wildlifeinformer.com/types-of-squirrels/

You'll need and extra SD card next time you visit.

We have grey squirrels in the UK, although they're not native. They're responsible for the decline in native red squirrels, you rarely see them now unless you go to particular areas.

and the german ones are really skittish too.

Those i saw on the canadian campus just lay next to the side walk, chilling. Fat and grey

American squirrels can be aggressive. I was eating an apple one day and I kid you not, a squirrel jumped at me and took it from my hand.

I wonder where you visited! Grey squirrels are rare where I’m from in the US, 90% brown in midwest