Nobody likes being caged up — even in the animal kingdom. Animals kept in captivity are always looking for a way out — if for no other reason than to satisfy an innate curiosity about the outside world. There are few events that demonstrate the ingenuity of our non-human brethren like when they outwit human captors. The television shows "Prison Break" and "The Fugitive" have got nothing on these remarkable animal escape stories. Here are 13 animal escape artists that would make Harry Houdini proud.
This gallery originally appeared in December 2011 and has been updated.