Puffins: clowns but also great timekeepers?

[Sunite]

Puffins: clowns but also great timekeepers?
      

Puffins may look like clowns but they’re excellent time-keepers.
Today, April 14, is traditionally the day when thousands of the seabirds land on the cliffs at Lovund island off north Norway at the start of the mating season. They sometimes land a day or two on either side of the date, first gathering in vast flocks after the long winter spent [...]
         

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