#12 Emus and kangaroos cannot walk backward

True.

“The Kangaroo and Emu are two animals that can not walk backwards. As a metaphor of the great Australian trait to leave baggage in the past and look optimistically to the future, the two hold the shield on the Australian Coat of Arms.” -http://www.convictcreations.com/animals/emu.htm 

Kangaroo websites which state they cannot walk backward:
http://simple.wikipedia.org/wiki/Kangaroo
http://www.mightymillers.com/australia.html