how often to change hummingbird nectar
The optimal size of the feeder depends on how many hummingbirds you attract. Most feeders hold between 10 to 20 ounces of nectar, which may be enough to meet your needs. Remember that nectar needs to be changed every 3 to 4 days, depending on the outside temperature. If the birds are emptying the feeder in 2 days or less, you may want to use a larger feeder or add another smaller feeder.