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Fill'er Up!
It took 77 seconds for this female to eat a full meal. Roll your mouse over the picture to see how she looked after she finished. Her stomach is full and so is her crop. Look at her neck and see the full crop. (The crop is a sac along the esophagus.) The crop lets her take in more nectar/sugar water than the stomach could hold. After her nice, full meal she flew away to digest. She returned every 12-15 minutes for more!

Images courtesy of Laura Erickson

Fill'er Up! Before and after images of a female hummingbird at feeder