The rails, or Rallidae, are a large widespread family of small to medium-sized birds. The family exhibits considerable diversity and the family also includes the crakes, coots, and gallinules. Many species are associated with wetlands, although the family is found in every terrestrial habitat except dry deserts, polar regions and alpine areas above the snow line.
Rails are especially fond of dense vegetation making photography in the wild difficult.
The different living genera are as follows:

Himantornis - Nkulengu Rail
Sarothrura - flufftails (9 species)
Canirallus (3 species)
Coturnicops (3 species)
Micropygia - Ocellated Crake
Rallina - forest rails (8 species)
Anurolimnas (3 species)
Atlantisia - Inaccessible Island Rail
Laterallus (10 species)
Nesoclopeus (1 living species, 1 recently extinct)
Gallirallus - Austropacific rails (11-12 living species, 3-5 recently extinct)
Weka Gallirallus australis
Rallus - typical rails (some 9 living species)
Lewinia (3 species; sometimes included in Rallus)
Dryolimnas (1 living species, 1 recently extinct)
Crecopsis - African Crake (sometimes included in Crex)
Crex - Corn Crake
Rougetius - Rouget's Rail
Aramidopsis - Snoring Rail
Aramides - wood rails (8-9 living species)
Gray-necked Wood Rail Aramides cajaneus
Amaurolimnas - Uniform Crake
Gymnocrex (3 species)
Amaurornis - bush-hens (9 species)
Porzana - typical crakes (13 living species, 4-5 recently extinct)
Aenigmatolimnas - Striped Crake
Cyanolimnas - Zapata Rail
Neocrex (2 species)
Pardirallus (3 species)
Eulabeornis - Chestnut Rail
Habroptila - Invisible Rail
Megacrex - New Guinea Flightless Rail
Gallicrex - Watercock
Porphyrio - swamphens and purple gallinules (6 living species, 2-5 recently extinct; includes Notornis and Porphyrula)
Gallinula - typical gallinules (7-9 living species, 1-3 recently extinct; includes Edithornis and Pareudiastes)
Fulica - coots (c.10 living species, 1 recently extinct)