http://www.animalfactguide.com/animal-facts/
https://animalcorner.co.uk/
http://kids.sandiegozoo.org/
https://kids.nwf.org/kids.aspx
http://kids.nationalgeographic.com/animals/
https://a-z-animals.com/animals/
http://www.softschools.com/facts/animals/
http://www.sciencekids.co.nz/sciencefacts/animals.html