How many ducks can you see in 30 seconds

A seemingly innocent image posted by the popular page Minion Quotes is driving internet users wild - after it challenged them to count every duck in a sneaky new brain teaser.

A Facebook page called Minion Quotes recently shared this optical illusion, which shows a flock of happy white ducks scattered across a bright yellow background.

At first glance, the picture looks simple enough - just rows of cute little birds waddling along in perfect formation.

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