I used these websites when researching:
- "Amazon.com: Hummingbird Feeder." Amazon. 1 Sept. 2007 <http://amazon.com/s/ref=nb_ss_gw/104-2300731-8503945?initialSearch=1&url=search-alias%3Daps&field-keywords=hummingbird+feeder&Go.x=0&Go.y=0&Go=Go>.
- Hilton, Bill. "Hummingbird: Measuring Hummingbirds." Ruby Throat. 20 Aug. 2007 <http://www.rubythroat.org/HummerMeasureMain.html>.
- "Hummingbird Food." For the Birds. 20 Aug. 2007 <http://www.for-the-birds.info/hummingbird-food.htm>.
- "Hummingbirds." Hummingbirds.Net. 17 Aug. 2007 <http://hummingbirds.net/index.html>.
- "Hummingbirds." Project Wildlife. 1 Sept. 2007 <http://www.projectwildlife.org/find-hummingbirds.htm>.
- "Hummingbirds." 19 Aug. 2007 <http://en.wikipedia.org/wiki/Hummingbirds>.
- Lake, Jane. "Hummingbird Food." All Free Crafts. 17 Aug. 2007 <http://www.allfreecrafts.com/nature/hummingbird-food.shtml>.
- Mark. "Feeders & Things." Mark's Hummingbirds. 1 Sept. 2007 <http://www.geocities.com/ms8534/donoharm.html>.
- Wren, C M. "Should I Use Red Food Coloring, or Commercial Nectar Mixes?" Gardenweb. 18 Aug. 2007 <http://faq.gardenweb.com/faq/lists/hummingbird/2003034451007591.html>.