Try this film about migration
http://www.play.com/DVD/DVD/4-/147841/Winged-Migration/Product.html
It was filmed over all 7 continents, took 3 years to make and is absolutley awesome. It shows some of the most spectacular migration footage you will see and the comentary is kept to a bare minimun .
pssst.....it's almost half the price on amazon........
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