Wild animals that have acquired adaptations to maximize their reproductive output in some of the world's most extreme ...

A female grey seal tending to her pup on the beaches of Sable Island, Nova Scotia. Gray seals only nurse their pups for 15-20 days before the female leaves and the pup must learn to forage on its own.

A female grey seal nursing her pup on the beaches of Sable Island, Nova Scotia. Gray seals give birth once a year and females will quickly lose ~30% of their body mass while the pup triples in size ...