Yes, flash may help, if you know how to use it, which I am struggeling with, taking shots of my backyard birds. Always nice to see two birds appear to be sharing. I like your background.
Keith
Nothing like getting a "2 fer" at the suet feeder. Fill flash would have definitely helped but with a feeder....you should have lots of time to try with a flash. With a lot of nice backyard birds, you could also set up some nice perches around the feeders for even more opportunities. Well done.