Last week I stumbled upon a website http://cam.dellwo.com which features a live webcam of a hummingbird nesting. She has two tiny eggs which are in the process of hatching. Check it out and I guarantee that you will be mesmerized by this close-up view of one of nature's tiny treasures. While you are enjoying the website, you should check out these books which will answer your questions about hummingbirds: A Field Guide to Hummingbirds of North America by Sheri L. Williamson, The Hummingbird Book :  the Complete Guide to Attracting, Identifying and Enjoying Hummingbirds by Donald and Lillian Stokes or Hummingbird Gardens : Attracting Nature's Jewels to Your Backyard by Nancy L Newman and Barbara Nielsen.