Mated bald eagle (Haliaeetus leucocephalus) pair on nest near the Brooks River, Katmai National Park, Alaska, United States of America

Bull with cow in meadow in County Clare, West of Ireland

Brown Herefordshire bull and fresian cow in mating process in meadow in Gloucestershire

Mated bald eagle (Haliaeetus leucocephalus) pair on nestj near the Brooks River in Katmai National Park, Alaska, USA. Pacific Ocean

Adult mated pair of black-legged kittiwakes (Rissa tridactyla) nested on cliff face in the Svalbard Archipelago, Barents Sea, Norway.

Oryx antelope curiously looking over the dune of Sossusvlei, mammal, ruminant, spikebuck, animal, ungulate, even-toed ungulate, mated, desert, sand, national park, Namibia Naukluft National Park, Southern Africa, Namibia, Africa

A mated pair of eagles (Haliaeetus leucocephalus) shares egg inubation duties during an early spring snowstorm in Alaska.

Two white wolves have mated for life after having been rescued (captivity).

A mated pair of northern gannets preen each other on their nest., Bonaventure Island, Quebec, Canada.