http://askabiologist.asu.edu/research/monarchs/life3.html#mls_2
http://www.biology-resources.com/birds.html
http://www.vtaide.com/png/chicken.htm
http://en.wikipedia.org/wiki/Main_Page
http://www.wildanimalsonline.com/
http://www.lgfl.net/
http://www.kented.org.uk/ngfl/subjects/science/index.htm
http://www.earthsendangered.com/search-regions3.asp
http://www.encyclopedia.com.my/volume3/contents.html
http://www.kidsites.com/sites-edu/animals.htm
http://www.gfes.tpc.edu.tw/board/abc-song/
http://iteslj.org/links/TESL/Songs/