This product is potentially dangerous for hummingbirds because it contains Red Dye and one or more preservatives. Even though hummingbirds might guzzle it down, that doesn't mean it is healthy for them. (I myself love all kinds of things that aren't healthy!) You do not need red dye in the nectar to attract hummingbirds. Most feeders have enough red on them to do that job. A simple mix of 4 parts water to 1 part sugar (don't use honey or sugar substitutes) is what is healthy for hummingbirds. Cook it, cool it and put in a bottle in the fridge and you've got the same convenience without the dangers of this product!