Funnily enough, my bird watching does in fact involve a screen — the electronic viewfinder on my camera[0].
Jokes aside, there is a very definite difference in how my brain "feels" when I'm walking around, camera in hand, looking for things to photograph. It's like I'm in a different "cognitive mode", for the lack of a better term. It's not just about being present and in the moment, but about seeing the world around you from a different perspective.
0. https://drive.google.com/file/d/1tnMlazV0g1syoRPLALJ6576YSYQ...
multiple times in the last few months I've done a thing and then a week after having done it, felt like it was something I'd have to be crazy to attempt, even though I did it and it went fine and it wasn't even that wacky. Because you get in a different mindset when you're actually doing something than when you're sitting at home wasting time on RuneScape*
* probably one of the less bad things you can do on a screen, since it predates the everything-for-attention era