Albert Collins, the great bluesman and guitarist. It is a little known fact, but his biggest song was written in honor of the mighty hummingbirds, specifically those that stay north this time of year. (I have several I feed all winter.)
The song? "I ain't drunk, I'm just drinkin'!"
My four (?) hummers drank 3 ounces of sugar water since yesterday morning. (I can't get them to wear name tags and they are backlit from my windows so I am never quite sure who's who.) So, lets just assume there are four of them and they ate all their meals here. (I know they don't; they go somewhere when my feeders are empty and return when I fill them.) 3 ounces x 28 grams/ounce = 84 grams. 84 grams/4 birds = 21 grams per bird. Say 1 1/2 days of feeding from yesterday morning 'til now. (They don't eat after dark.) 21/1.5 = 14 grams per bird per day. Best numbers I can get for a hummer weight is about 3 grams = one penny. 14/3 ~= 5 times the hummer's body weight. That's 850 pints for you manly drinkers.
I buy 10 pound bags of sugar for them, probably every 18 months. During the summer about half gets dumped out after about 5 days. In winter the feeders are near empty in four. So they actually consume easily half the bag. (Nearly 800 hummer weights consumed.)
Pretty amazing creatures!
Edit: I realized as soon as I sent this it needed an OT in the topic. Sorry guys!