Well, not sure Iceland has any actual birds, so... ;’)
http://www.iceland-nh.net/birds/
https://guidetoiceland.is/nature-info/birds-in-iceland
Good links to birds in Iceland.
I was going to say I knew of one - Ptarmigan - but Holy Smoke - there’s a bunch of them.
My husband was stationed there in the middle fifties and that’s the only one he mentioned....guess he didn’t see others or know their names. Who would?