Sounds like an adventure! Good for you and your birds.
I love serviceberries! Native and easy to grow. They make excellent pies, similar to blueberry, but since they’re drier, the pie holds together better. Also, you don’t even notice the seeds when cooked, as they seem to soften to nothing.
I’m not sure which variety you bought, but there is a more treelike version (amelanchier canadensis) and shrub type (amelanchier alnifolia). In Canada, they’re grown commercially for jam and some home nurseries sell more heavily fruiting varieties. We planted several at our old house and some at our new home.