(17) http://en.wikipedia.org/wiki/Image:Gorrila_tool_use-Efi.jpg. CC-BY 2.5.
(18) http://en.wikipedia.org/wiki/Image:Asian_girl_with_dimples.jpg. CC-BY
2.0.
(19) American_Robin_2006.jpg. CC-BY-SA 2.5.
(20) http://commons.wikimedia.org/wiki/Image:Wild_rabbit.jpg. GNU-FDL.
(21) http://commons.wikimedia.org/wiki/Image:A_Texas_Ant_Colony.jpg.
CC-BY-SA 2.5.
(22).
(23) http://commons.wikimedia.org/wiki/Image:CrhSand.jpg. CC-BY-SA 2.5.
(24) http://commons.wikimedia.org/wiki/Image:LagartoDestaque.jpg. CC-BY-SA
2.0.
(25) USGS.http://commons.wikimedia.org/wiki/Image:
Swainson%27s_hawk_migration_route.jpg. Public Domain.
(26) Bee_swarm_on_fallen_tree03.jpg. GNU-FDL.
(27) http://en.wikipedia.org/wiki/File:Bee_on_Geraldton_Wax_Flower.JPG. Public
Domain.
(28) http://www.cosi.org/files/Image/photos/press/RatBasketball01.jpg. Used
by permission – COSI Columbus, COSI.org.
(29) http://commons.wikimedia.org/wiki/Image:Young_male_chimp.png. CC-BY 2.5.
(30) http://farm1.static.flickr.com/223/490628352_5c686bfe60.jpg?v=0.
Unknown; information not provided on Web site.
(31) David Dennis.http://en.wikipedia.org/wiki/Image:Lion_cubs_Serengeti.jpg.
CC-BY-SA 2.0.
