Puffins, who can live as long as 30 years, form long-term pair bonds for mating. The couples come together for mating season each year and dig a burrow or return to their burrow from the previous year. After mating, the female lays a single egg inside the burrow. The parents take turns incubating the egg and flying out to sea to find food for the puffling once it has hatched. When their puffling fledges (develops flight feathers and can leave the nest), the three return to sea for the winter. Puffin pairs rarely “divorce” unless one of the birds dies.

Pictured above: Atlantic Puffins (Photo sources: x x x x x x x)