What a fantastic idea! I have never seen this done on a bagel, how cute!~
We did this with pine cones as kids. I have never seen it done with bagels, but I bet the birds enjoy it! For an art project in college we decorated a Christmas tree for the birds on our campus. We strung berries and unsalted/unbuttered popcorn on string for garland and used the pine cone seed feeders for ornaments. I bet bagels would have added a nice touch, too, with different sized ornaments. And have the birds hit you up yet?
Unfortunately, we had a great deal of rain two days after I hung them up - the one that I could see from the house got soggy, I guess, and fell down. Still, the seeds are not going to get waterlogged, so I assume they'll be found. Too bad, though. She had put peanut butter on first, then the seeds.
Hmmm...I guess that might happen. I hadn't thought of it though. So, maybe the pine cone is better after all. Either way, I am sure it get eaten!