Hummingbirds are sugar powered hunters. All of their protein, fats and necessary vitamins and minerals come from insects. They are very nutritious! There would probably be no starvation in the world if humans would get over their aversion to eating insects.
Ornithologists estimate that 60-80% of their diet is spiders. They snatch many insects and spiders out of webs without getting tangled themselves. They catch flying insects in mid-air. Their incredible eyesight, speed and agility allows them to capture flying insects such as gnats, flies and mosquitos.