This is now driving me crazy. Love the games, finished Frogwell, and now I have 81/84 birds and I know which three I'm missing because it's the one in the very lower left, the one you reveal with the book I can't reach because of the very lower left, and the yellow bird that you can't get near because of the very lower left.
The very lower left, is what I'm saying. Cannot for the life of me figure out how to wake it up. Whatever am I missing?