My mother has attracted a large group of hummingbirds to her home. There are approximately 15 of them now. Each day they go through at least 10 cups of sugar-water. If the average hummingbird weighs 3 grams, that would mean each bird is drinking over 52 times its bodyweight each day, considerably more than it would be able to get via nectar. I know that, in the wild, hummingbirds drink nectar and supplement that diet with small insects. At mom's, they swarm around the feeders pretty steady all day long and I doubt they are spending much time forraging for insects.
Does my mom need to cut down the amount she is providing, supplement the water with some sort of avian liquid vitamin, or do something else to make sure the birds stay healthy.
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