Perhaps they have an inverted colour scheme to that of ordinary budgies, or perhaps you can't tell the difference, I don't know. Myself, I imagine them with a fully extradimensional colour array, intangible to lesser minds and capable of driving rational humans to an otherworldly madness. A Lovecraftian palette, if you so wish.
Swedes, Danes and Norwegians are generally able to understand eachother perfectly well if we don't get all too excited and/or drunk (although Danes sound like they're drunk to start with, so perhaps we're easier for them to understand while slightly inebriated ).
Icelanders can even be intelligible if it's a good day, but it's hard and requires a good knowledge of both aged vocabulary and an affinity with puzzles. Takes the Icelandic word "lögregla". At first it looks like complete nonsense, but when you take it apart, you get "lög", which isn't all too unlike "lag" ("law"), and "regla", which sounds like "reglera" ("regulator"). So, the gibberish "lögregla" is actually a law regulator, or a policeman (although I might have gotten my etymologies wrong, seeing how "regla" also sounds like "regel" ("rule")).
Our national mythos is mainly carried through tradition and children's tales, just like we've always done.
Probably. I've never looked, so I wouldn't know, but I find it highly unlikely that you'd be completely unable to find a Swedish Literature course in all of Sweden.
That said, I wouldn't be all too surprised if you found more Swedish Literature courses outside of Sweden than within its borders...
Yay!
*huggles all budgies around*