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added by globalquiz.org May 10, 2013, 2:31 p.m.
Which birds use their beaks upside down?
toucans
flamingos
storks
penguins
Flamingos filter-feed on brine shrimp and blue-green algae. Their beaks are specially adapted to separate mud and silt from the food they eat, and are uniquely used upside-down. The filtering of food items is assisted by hairy structures called lamellae which line the mandibles, and the large rough-surfaced tongue.
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+1 Very interesting!  user276764777
+5 Very interesting!  globalquiz.org