Recently, it was found that the mercury content in the feathers of seabird specimens preserved in the 1980s was only half of that of the current live birds of the same species
The accumulation of mercury in seabird feathers is caused by seabirds eating fish, which shows that the content of mercury in seafish is higher than that more than 100 years ago
The methods used for the preparation and preservation of seabird specimens did not significantly reduce the mercury content in seabird feathers.