Adult rockhopper penguins (Eudyptes chrysocome) at nesting site on New Island, Falkland Islands, U.K. Overseas Protectorate, South America

Blue footed booby (sula nebouxii) incubating eggs at Punta Pitt, San Cristobal Island, Galapagos, UNESCO, Ecuador

Female mute swan building her nest, Donnington, Gloucestershire, United Kingdom

Female mute swan asleep on nest of moss and twigs, Donnington, Gloucestershire, The Cotswolds, England, United Kingdom

A Wandering Albatross; Diomedea exulans, the bird with the largest wing span on the planet, at around 11 feet 6 inches, nesting on Prion Island, South Georgia, Southern Ocean.

A Wandering Albatross; Diomedea exulans, the bird with the largest wing span on the planet, at around 11 feet 6 inches, nesting on Prion Island, South Georgia, Southern Ocean.

A Wandering Albatross; Diomedea exulans, the bird with the largest wing span on the planet, at around 11 feet 6 inches, nesting on Prion Island, South Georgia, Southern Ocean.

An adult Leucistic Gentoo penguin (Pygoscelis papua) nesting and incubating two eggs at Gabriel Gonzales Videla Research Station, Antarctica

An adult Leucistic Gentoo penguin (Pygoscelis papua) nesting and incubating two eggs at Gabriel Gonzales Videla Research Station, Antarctica

An adult Leucistic Gentoo penguin (Pygoscelis papua) nesting and incubating two eggs at Gabriel Gonzales Videla Research Station, Antarctica

Adult Adelie penguin (Pygoscelis adeliae) laying on an egg on breeding colony on Petermann Island, Antarctica

Adult Adelie Penguin (Pygoscelis Adeliae) incubating its eggs. Commonwealth Bay, East Antarctica

Adult gentoo penguin (Pygoscelis papua) nesting an egg on Petermann Island, Antarctica

Adult gentoo penguin (Pygoscelis papua) on two eggs at breeding colony on Barrentos ISland in the Aitcho Island Group, South Shetland Islands, Antarctica

Adult gentoo penguins (Pygoscelis papua) nesting an egg on Petermann Island, Antarctica

Adult gentoo penguin (Pygoscelis papua) on egg at breeding colony on Petermann Island, Antarctica

Adult gentoo penguin (Pygoscelis papua) on two eggs at breeding colony on Barrentos ISland in the Aitcho Island Group, South Shetland Islands, Antarctica

Adult Adelie penguin (Pygoscelis adeliae) sitting on an egg on breeding colony on Petermann Island, Antarctica

Adult gentoo penguin (Pygoscelis papua) nesting on egg on Barrentos Island in the Aitchi Island Group, South Shetland Islands, Antarctica

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

This male Ring-tailed Cardinalfish (Ostorhinchus aureus) is protecting and incubating it's eggs by carrying them in his mouth, Philippines