PBS's Nature program “Magic of the Snowy Owl” might be of special interest as you launch your study of owls.
The Great Horned Owl is the most common owl in North and South America. National Geographic has a site all about this amazing creature.
Kidzone has more on the Great Horned Owl, including coloring and activity sheets.
Mexican Spotted Owls are endangered. Learn more about them at Defenders of Wildlife.
The cactus ferruginous pygmy-owl is a tiny owl measuring less than 7 inches in height. See one for yourself and learn more about this tiny creature at Defenders of Wildlife.