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...