http://www.saveafricananimals.org/ochrana-zvirat
http://www.top10list.cz/top-10-kriticky-ohrozene-zivocisne-druhy/
http://www.savetherainforest.org/savetherainforest_002.htm
https://www.youtube.com/watch?v=I7Hg_sDFIew
https://www.youtube.com/watch?v=QQ6uP1HemkI