This 7 February 2017 video shows a big flock of shoveler ducks. Together, they turn around in the water to drive small water animals which they feed on to the surface.
Edith Kwaaitaal from the Netherlands made this video.
This 7 February 2017 video shows a smaller group of shoveler ducks, one female and two males, trying the same tactic.
Harry Brummelhuis from the Netherlands made this video.
Dear Kitty. Some blog 
Reblogged this on Die Erste Eslarner Zeitung – Aus und über Eslarn, sowie die bayerisch-tschechische Region!.
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Those shoveler ducks are amazing – who would have thought there would be such symmetry to feeding!
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Yes, they help each other.
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