This track is released under the GNU GPL except :

* grass_dark
    by Christoph Egger <debian@christoph-egger.org>, Marianne Gagnon (Auria) and MiniBjorn
    released under CC-BY-SA 3.0+

* nightsky1 and nightsky2, owl
    by Marianne Gagnon
    released under CC-BY-SA 3.0+

* roof
    which is derivated from City track
    (c) 2008 thomas oppl (toppl@fh-sbg.ac.at)
    licensed under CC BY-SA 3.0
    http://creativecommons.org/licenses/by-sa/3.0/

* plants
    By MiniBjorn, under Creative Commons CC-BY-SA 3.0+

* grave
    By qubodup, West and KroArtem
    Released under Creative Commons CC-BY-SA 3.0+
