The Collaborative International Dictionary of English v.0.48:

Yellowthroat \Yel"low*throat`\, n. (Zool.)
   Any one of several species of American ground warblers of the
   genus Geothlypis, esp. the Maryland yellowthroat
   (Geothlypis trichas), which is a very common species.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Geothlypis trichas
    n 1: an American warbler [syn: common yellowthroat, Maryland
         yellowthroat, Geothlypis trichas]