They're all over the southern part of the country (in Austria, Czechia and Hungary, too) :) Check ebird for a place close to you, especially if you're farther up north: I think they have not arrived there, yet

In Slovakia! They have just arrived a few days ago and they're astonishing :)

I confirm. I love standing under a tree full of starlings with Merlin on and laugh at how it gets fooled. They are only here from March till November, so I like to think they spend the winter learning foreign languages, lol!