The Collaborative International Dictionary of English v.0.48:

Limpkin \Limp"kin\ (l[i^]mp"k[i^]n), n. (Zool.)
   Either one of two species of wading birds of the genus
   Aramus, intermediate between the cranes and rails. The
   limpkins are remarkable for the great length of the toes. One
   species (Aramus giganteus) inhabits Florida and the West
   Indies; the other (Aramus scolopaceus) is found in South
   America. Called also courlan, and crying bird.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Courlan \Cour"lan\ (k??r"l?n), n. (Zool.)
   A South American bird, of the genus Aramus, allied to the
   rails.
   [1913 Webster]

WordNet (r) 3.0 (2006):

courlan
    n 1: wading bird of South America and Central America [syn:
         courlan, Aramus guarauna]