Gallinule n. : One of several wading birds, having long, webless toes, and a frontal shield, belonging to the family Rallidae. They are remarkable for running rapidly over marshes and on floating plants. The purple gallinule of America is Ionornis Martinica, that of the Old World is Porphyrio porphyrio. The common European gallinule (Gallinula chloropus) is also called moor hen, water hen, water rail, moor coot, night bird, and erroneously dabchick. Closely related to it is the Florida gallinule (Gallinula galeata).

Example:
Images of the purple Gallinule nests?

Taxonomy
American Purple Gallinule, Porphyrio martinica, species, Birds, Purple Gallinule, free encyclopedia, Florida, USA, American, Porphyrio porphyrio, swamp, rail, purple, marshes, least concern, The American, family Rallidae, American birds, Everglades National Park.

Defination from the web:
Gallinule (Porphyrio martinica) is a "swamp hen" in the rail family Rallidae. ... These gallinules will fly short distances with dangling legs. ... American Purple Gallinule videos on the Internet Bird Collection ...