The alboka (from Arabic "al-bûq", meaning horn) is a pipe instrument used in the Basque region between Spain and France.
The alboka has a reed and 7 fingerholes. The bell is an animal horn (a real one), with holes used to change the length of the "pipe".
The instrument is a combination of real animal horn, and a manufactured extended body and mouthpiece.
Source:
http://www.flickr.com/photos/lesyeuxheureux/galleries/72157625836726257/
http://www.flickr.com/photos/lesyeuxheureux/galleries/72157625836726257/#photo_3612669167