Gruidae
Common Crane (Grus grus), International Crane Foundation, Majestic & Endangered Whooping Crane (Grus ame, Sandhill Crane, Sandhill Crane (Grus canadensis), Sandhill Crane (Grus canadensis), Whooping Crane Conservation Association, Whooping Crane Report
Rallidae
Fulica, Gallinula, Gallirallus, Laterallus, Porphyrio, Porzana, Rallus, Moho-pereru, The Banded Rail (Rallis philippensis)
Great Bustard Project
Facts about the behavior and ecology of Otis tarda in Spain. Includes results of research projects on breeding, dispersal, and migration.