I'm crazy in love with that little bird! So much so that I've been looking at the birds a lot, comparing the two that are on the more refined version you have now.
Both are very perky, but I find myself drawn more to the one that is inside the D, the more front-facing one on the left. It relates better to the viewer.
Then, I'm thinking this: if the coin doesn't have to replace an "O", maybe it could be drawn in perspective, not held in what must be a difficult position for the poor bird.
Nudone, is there any possibility you could do the more front-facing bird with its head cocked slightly -- and place the coin at an angle, more natural for the beak? Is this putting too fine a point on it? Maybe it's asking too much? Unless you have two birds, though, I really like the more front-facing one better.
And don't forget, the coin should be more generic (not american dollar sign).