FUENTES DE CONSULTA

http://www.ecuatorianisimo.com/animales.html

http://www.latarde.com.ec/2013/07/09/condor-andino-simbolo-de-ecuador-en-peligro-critico-de-extincion/

http://mariadoloresgago.blogia.com/2009/011404-la-pequena-foca-arpa.php

http://www.ecoportal.net/Temas-Especiales/Animales/foca_arpa_un_mundo_insostenible_sordo_y_ciego

http://www.ballenapedia.com/

http://nationalgeographic.es/animales/mamiferos/bengala-tigre

https://sites.google.com/site/saveplanet604/tigre-de-bengala

https://sites.google.com/site/saveplanet604/oso-polar

http://www.cambugan.org/es/2013/07/endangered-bear-spotted-in-cambugan-watershed/

http://www.animales-en-extincion.com/elefante-africano.html

http://www.elefantepedia.com/los-elefantes-en-peligro-de-extincion/