Common eider nesting (IMAGE) University of Helsinki Caption Tolerance to human presence can be very high even during the breeding season. Common Eider females are incubating eggs in the nature reserve on the Isle of May, Scotland, where approximately 10,000 people visit during the breeding season. Credit Emma-Liina Marjakangas. Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. License CC BY-NC Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.