We live in Northern California and have Annas hummingbirds and Rufous hummingbirds migrate through our area spring and fall. In the 7 summer months here we go through 50lbs of sugar a week feeding the birds. My husband buys suger in 50 lb bags from Costco. Hummers are at their height when not only the adults come to the feeders, but they are joined by the juvenile’s as well. We have 9, 5 cup feeders on our back deck and they need to be refilled every day and a half. Since so many birds are dependent on us, if we go away we hire someone to come and fill the feeders each day.