Hummer/Bird Study Group
- Documents the preservation of hummingbirds and other neotropical migrants. Learn about the variety of species, winter banding and feeding tips.
- http://www.hummingbirdsplus.org/

Hummingbirds.net
- Offers summaries on hummingbirds species, including a photo album, migration maps, articles, and feeding tips.
- http://www.hummingbirds.net/species.html

Hummingbird
- Brief information about the hummingbird such as color, breeding habits, and flight.
- http://www.sandiegozoo.org/animalbytes/t-hummingbird.html

Operation RubyThroat
- An international research and education project in which K-12 students, teachers, and others are studying the behavior and distribution of the Ruby-throated Hummingbird.
- http://www.rubythroat.org/