CLI News
Mar 24, 2021
4 minutes
Darkness in Denmark
EVERY spring and autumn, the sky turns dark in Denmark—all because of birds. Hundreds of thousands of starlings gather above the salt marshes of the Wadden Sea National Park, in the Jutland peninsula, and dance together across the evening sky, often blocking out the sun. Their mesmerising movement is a very effective survival strategy, confusing birds of prey until night falls and the starlings can take refuge among the marshes’ reed forests.
The birds visit the food-rich Wadden Sea twice a year: between March and mid April, ahead of the breeding season, and from September to the end of October, when they need nourishment to brave winter. Although
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