Secretarybird: Sagittarius serpentarius
- Photographs and information on this bird, the only member of its genus, its description, habitat, diet and reproduction.
- http://www.peregrinefund.org/Explore_Raptors/secrbird/secrbird.html

Secretarybird
- Information on this bird, its diet and habits.
- http://www.pauldfrost.co.uk/secretary.html

Birds of Prey
- Names and photos of birds of prey.
- http://home.hccnet.nl/r.goedegebuur/roofvog/roofidxe.html

Raptor Information System
- A keyworded catalog of over 40,000 references about the biology and management of birds of prey.
- http://ris.wr.usgs.gov/

Buteo.com
- Photos and facts about birds of prey (eagles, hawks, falcons, kestrels, owls, harriers, accipiters, buteos, osprey) that can be seen in the United States.
- http://www.buteo.com/

Raptors
- Images and notes on many species from around the world.
- http://www.greglasley.net/raptorix.html

Peregrine Fund
- Works to conserve wild populations of birds of prey.
- http://www.peregrinefund.org/