Ingo Arndt / Northern Elephant Seal (Mirounga angustirostris) with calf, Ano Nuevo State Reserve, California, USA

Ingo Arndt / Northern elephant seal male {Mirounga angustirostris} Ano Nuevo SR, California, USA

Ingo Arndt / Male Northern elephant seal display {Mirounga angustirostris} Ano Nuevo SR, California, USA

Ingo Arndt / Northern elephant seals {Mirounga augustirostris} hauled out resting on beach, Ano Nuevo State Reserve, California, USA

Ingo Arndt / Northern elephant seal bull {Mirounga angustirostris} display, Ano Nuevo State Reserve, California, USA.

Ingo Arndt / Northern elephant seal (Mirounga angustirostris) group with young on beach, Ano Neuvo State Park, California, USA

Ben Lascelles / Northern Elephant Seal (Mirounga angustirostris) female calling, Ano Nuevo Elephant Seal Rookery, Big Sur, California, USA, January

Ben Lascelles / Northern Elephant Seal (Mirounga angustirostris) Ano Nuevo Elephant Seal Rookery, Big Sur, California, USA, January

Jenny E. Ross / Adult male Northern elephant seal (Mirounga angustirostris) swimming near shore, and vocalizing to other males on the beach, after losing a territorial battle. Ano Nuevo State Reserve, California, USA...

Jenny E. Ross / Young adult male Northern elephant seals (Mirounga angustirostris) battling for dominance on the beach at Ano Nuevo State Reserve, California, USA. August

Jenny E. Ross / Adult male Northern elephant seal (Mirounga angustirostris) swimming near shore, and vocalizing to other males on the beach, after losing a territorial battle. Ano Nuevo State Reserve, California, USA...

Suzi Eszterhas / Northern Elephant Seal (Mirounga angustirostris) female giving birth, Ano Nuevo State Reserve, California