Video source: 
Flying Penguins - ACTUAL FOOTAGE FROM THE BBC! (2008). Retrieved November 30, 2014, from http://youtu.be/IYVBaTD0zqw

Flying Penguins BBC April 1st. (2008). Retrieved November 30, 2014, from http://youtu.be/mkyYbIhBRmg?list=PLB5okBz91ysL11BpYxG6D1tXOW61h79Ji