Huge duck flocks forming during bird migration season in northern europe

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• birds flying
• large
• bird
• fly
• environment
• eco
• fall
• blue nature
• autumn
• life
• blue cloud
• duck
• freedom
• biology
• blue sea
• day
• animal
• sea
• life science
• nature
• nature scene
• science
• cloud
• beach sea
• beach scene
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