Bibliography:
- Banville, Paul. The definitive Visual Guide to the World´s Wildlife, Dorling Kindersley Limited, Londres, 2001
*http://www.youtube.com/watch?v=P0g37X3i1Dk
*http://www.youtube.com/watch?v=NKKN5YL4QJM&feature=related
*http://www.youtube.com/watch?v=PMFXCroUlHE *http://www.youtube.com/watch?v=If7doNiezw0&feature=related
*http://www.youtube.com/watch?v=63tPVzmfOTM
*http://www.li.lv/
*http://www.president.lv/
*http://www.youtube.com/watch?v=UvCXLacM2sU