CRAIG K. LORENZ / SCIENCE PHOTO LIBRARY CRAIG K. LORENZ / SCIENCE PHOTO LIBRARY
Northern Elephant Seal (Mirounga angustirostris) pups are weaned when the mother abruptly departs for the sea. The weaned pups, dubbed weaners, have quadrupled their birthweight and are nice and plump. They will lose about 1/3 of their weight during the ''weaner fast,'' the 8-10 weeks they remain at the rookery, teaching themselves how to swim, before taking off on their first foraging trip. San Simeon, Ca.
Model release not required. Property release not required.