As I said we have been using bird ornaments for a number of years.  These are some examples.
 
 
 
 
 
There are not a lot of such ornaments for sale now - I don't know why.  But even of the stock there is, we have to be careful and not get one too heavy or too big in appearance for the branches of the tree.  This year Julianne gave us another one as a Christmas present.