Atlantic puffins face an increasingly precarious foothold due in part to a loss of habitat and to troubles tied to warming ocean waters and climate change.

Maine ocean islands provide the only nesting sites for Atlantic puffins in the United States. Eastern Egg Rock in the midcoast region, Seal Island and Matinicus Rock at the mouth of Penobscot Bay, and Machias Seal Island and Petit Manan Island off the dow...