The query refers to of the nature documentary series Prehistoric Planet , titled " Freshwater " .
Originally aired on , this episode explores various prehistoric species living in and around the world's freshwater systems, including rivers, lakes, and wetlands. It is narrated by Sir David Attenborough and features a musical score by Hans Zimmer . Key Segments and Species Featured
: An eight-ton, feathered, duck-billed dinosaur is featured wading through Asian wetlands to find relief from biting flies.
: A pack (a female and two males) is shown hunting juvenile pterosaurs (specifically Azhdarchids ) on the cliffs surrounding a massive waterfall.