http://www.theanimalfiles.com/mammals/carnivores/lion.html
https://en.wikipedia.org/wiki/Lion#Hybrids
http://www.livescience.com/27404-lion-facts.html
Information about birds from:https://www.allaboutbirds.org/guide/Northern_Cardinal/id
http://animals.nationalgeographic.com/animals/birds/peacock/
http://www.oddee.com/item_98487.aspx
http://animals.nationalgeographic.com/animals/birds/macaw/
Information about deserts from:http://www.factslides.com/s-Desert
http://environment.nationalgeographic.com/environment/habitats/desert-profile/
https://en.wikipedia.org/wiki/Desert
Information about tigers from:http://www.onekind.org/education/animals_a_z/tiger/
Information about sharks from:http://www.discovery.com/tv-shows/shark-week/shark-facts/top-100-shark-facts/?fact_id=112982
http://www.defenders.org/sharks/basic-facts
Information about butterflies from:http://www.onekind.org/education/animals_a_z/butterfly/
http://www.encyclopedia.com/topic/butterfly.aspx
Information about antarctica from:http://www.livescience.com/21677-antarctica-facts.html
http://www.livescience.com/43881-amazing-antarctica-facts.html
Information about animals of antarctica from:http://animals.nationalgeographic.com/animals/birds/emperor-penguin/
Not all articles of this web-page are now full of information.