Combine sugar and water in saucepan and bring to boil for 5 minutes.
Cool thoroughly.
Fill hummingbird feeder.
Hang feeder outside. Store leftovers in airtight container in fridge for 5 days. Note expiry date.
Notes
Sugar: do NOT use brown sugar, honey, sugar powders, artificial sweeteners. These items can cause a range of problems including bird illness, rapid bacteria and fungi growth, and the potential spread of disease.
Do not use red food coloring or red dye.
Make small batches as needed: clean and refill feeder frequently on warm days. You may need to remove feeder on hot days to avoid mold.