The Collaborative International Dictionary of English v.0.48:

Ortolan \Or"to*lan\, n. [F., fr. It. ortolano ortolan, gardener,
   fr. L. hortulanus gardener, fr. hortulus, dim. of hortus
   garden. So called because it frequents the hedges of gardens.
   See Yard an inclosure, and cf. Hortulan.] (Zool.)
   (a) A European singing bird (Emberiza hortulana), about the
       size of the lark, with black wings. It is esteemed
       delicious food when fattened. Called also bunting.
   (b) In England, the wheatear (Saxicola oenanthe).
   (c) In America, the sora, or Carolina rail (Porzana
       Carolina). See Sora.
       [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Bunting \Bun"ting\, n. [Scot. buntlin, corn-buntlin, OE.
   bunting, buntyle; of unknown origin.] (Zool.)
   A bird of the genus Emberiza, or of an allied genus,
   related to the finches and sparrows (family
   Fringillid[ae]).
   [1913 Webster]

   Note: Among European species are the common or corn bunting
         (Emberiza miliaria); the ortolan (Emberiza
         hortulana); the cirl (Emberiza cirlus); and the
         black-headed (Granitivora melanocephala). American
         species are the bay-winged or grass (Po["o]c[ae]tes
         gramineus or Po[oe]cetes gramineus); the
         black-throated (Spiza Americana); the towhee bunting
         or chewink (Pipilo); the snow bunting (Plectrophanax
         nivalis); the rice bunting or bobolink, and others.
         See Ortolan, Chewick, Snow bunting, Lark
         bunting.
         [1913 Webster] Bunting

WordNet (r) 3.0 (2006):

Emberiza hortulana
    n 1: brownish Old World bunting often eaten as a delicacy [syn:
         ortolan, ortolan bunting, Emberiza hortulana]