There are lots of Hummingbird Fun Facts out there. Here's a gallery of images to help illustrate a few of these fascinating facts.
They do not have an innate preference for red.
Each hummingbird must learn to associate red, purple, or other colored flowers/feeders and food. Here's one enjoying a stop at a purple-colored feeder.
Hummingbirds eat about every 10 minutes; this male is getting a quick sip at a WBU Window Hummingbird Feeder
Hummingbirds can extend out their tongue approximately a distance equal to the length of their bill. While lapping up nectar, they move their tongues in and out of their bill at a rate of up to 12 times a second. Click on this image and you can see the beak, tongue, and ripple on the nectar through the clear bottom bowl of a WBU hummingbird feeder.