All images used in this example are from sxc.hu
and under restriction-free licenses. See the 
following URLs for details.

http://www.sxc.hu/photo/466378 frog
http://www.sxc.hu/photo/467047 human
http://www.sxc.hu/photo/459764 cat
http://www.sxc.hu/photo/323538 turtle
http://www.sxc.hu/photo/173623 rabbit
http://www.sxc.hu/photo/41801 rooster
http://www.sxc.hu/photo/16220 cormorant