Severno more pruža bogatu nagradu za ove ptice njihov ribolov može da traje između 7 i 13 časova, direktna korist od dugih letnjih dana su vrhunac letnjih dugodnevica.
The north sea provides rich rewards for these birds and their fishing trips can last between 7 and 13 hours, a direct benefit of the long summer days as they peak towards the summer solstice