Um... I feel stupid after this quiz. Everyone is complaining of too much time and acing this quiz when I am over here hitting my head on how I didn't get Brazil or Russia.
As usual on shape quizzes I did abysmally. I couldn't get Russia because it looked so small in comparison to the others I didn't even think about the possibility. At least I scored one point.
I would guess it's probably because it is so far away that it would make the map look weird. Same reason that French Guiana is omitted in pictures of France on Jetpunk.
Edit: well except for tillydog everybody kept it a secret for him/her (see an earlier comment)