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]

WordNet (r) 3.0 (2006):

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