The Collaborative International Dictionary of English v.0.48:

Gruiformes \Gruiformes\ n.
   An order of inland marsh-dwelling birds with long legs and
   necks and bills that wade in water in search of food,
   including cranes, rails, and bustards.

   Syn: order Gruiformes.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Gruiformes
    n 1: inland marsh-dwelling birds with long legs and necks and
         bills that wade in water in search of food: cranes; rails;
         bustards [syn: Gruiformes, order Gruiformes]