The Collaborative International Dictionary of English v.0.48:

Bobwhite \Bob"white`\, n. (Zool.)
   The common quail of North America (Colinus, or Ortyx,
   Virginianus); -- so called from its note.
   [1913 Webster]

WordNet (r) 3.0 (2006):

bobwhite
    n 1: a popular North American game bird; named for its call
         [syn: bobwhite, bobwhite quail, partridge]