The Collaborative International Dictionary of English v.0.48:

Reedbird \Reed"bird`\ (r?d"b?rd`), n. (Zool.)
      (a) The bobolink.
      (b) One of several small Asiatic singing birds of the
          genera Sch[oe]nicola and Eurycercus; -- called
          also reed babbler.

The Collaborative International Dictionary of English v.0.48:

Bobolink \Bob"o*link`\, n. (Zool.)
   An American singing bird (Dolichonyx oryzivorus). The male
   is black and white; the female is brown; -- called also,
   ricebird, reedbird, and Boblincoln.
   [1913 Webster]

         The happiest bird of our spring is the bobolink. --W.
                                                  Irving.
   [1913 Webster] Bobsled

WordNet (r) 3.0 (2006):

reedbird
    n 1: migratory American songbird [syn: bobolink, ricebird,
         reedbird, Dolichonyx oryzivorus]
    2: small European warbler that breeds among reeds and wedges and
       winters in Africa [syn: sedge warbler, sedge bird, sedge
       wren, reedbird, Acrocephalus schoenobaenus]