Black-headed Siskin - Spinus notatus
Photo: Pablo Leautaud. (http://www.flickr.com/photos/pleautaud/3472256912/); Mexico; Adult; Male;
Song: Calls and songs similar to Pine Siskin's. Up-slurred whining "suii", short dry "tchek" and buzzy "djeeeerrr" notes. Song is an extended scratchy twittering warble.
Sound: Fernando González-García (Biblioteca de Sonidos Aves de México); 2002 Feb 2; Mexico, Veracruz; Cinco Palos, Coatepec; Flock/Group; Mixed; Call;
