All it takes is:
- one part white table suger
- four parts tap water
Stir sugar into tap water in a pan on the stove and bring to a boil. Boil two minutes only (to get rid of chlorine and other impurities) and then allow to cool. Add to your feeder.
As you can see, preparing your own syrup is less costly and better for the little birdies than buying the red-colored pre-prepared stuff anyway. So keep giving them nourishment until they migrate.