Glenveagh National Park. Apparently, there is only one pair there, despite all the fuss that was made about re-introducing eagles to Ireland - farmers didn't like it, and they poisoned them. Crazy, isn't it? But that's what happened. That's the kind of country Ireland is, I'm afraid - on the one hand so proud of its beautiful environment, and on the other quite willing to destroy that environment for profit.
But we did see strange ferns - at least I think they're ferns.
If you're in the area, eagles or no eagles, Glenveagh National Park is a must see - and the chocolate cake in the tea rooms is to die for (if you don't mind butter, that is).