The father gyrfalcon hasn't brought home enough food, so the mother decides to go on the hunt.

Mother penguins reunite with their mates and chicks -- and celebrate survival in the harsh Antarctic climate.

Gordon Buchanan has found the perfect opportunity to get closer to the white-tailed sea eagle nest.

Following their parents' lead, the flamingo chicks march across the barren desert for weeks.

Joseph Duff is one of the leaders of Operation Migration, a nonprofit organization that is using aircraft to restore migrating populations of whooping cranes.

To help ensure the survival of endangered whooping cranes, Operation Migration maintains an artificial breeding program that prepares chicks for adulthood.