I'm guessing, but it looks like you could fussy cut the birds into 5" squares. So any pattern that you like that features 'charm packs' would work. I would definitely add a cream and depending on the pattern, maybe a forest green. You could add a red, but that can be a very difficult color to match. One of my favorite bindings I made (totally by accident) was a sort of striped pattern that I had to cut crosswise to use - long, crazy story! It looked fantastic with the multi colors peeping out at the edge. I would consider doing this type of binding with the ribbon leftovers. I think the birds and ribbons are a great start to a wonderful holiday project.