White stork

The white stork, scientifically known as Ciconia ciconia, is a large and highly recognizable bird.

It belongs to the stork family, Ciconiidae, and is famous for its distinctive appearance. These birds feature mainly white plumage with black flight feathers and wing coverts. The black color is caused by a pigment called melanin. Adults are easily identified by their long, pointed red beaks and long red legs.

These bright red colors actually come from carotenoids found in their diet. For example, in parts of Spain, storks get a specific pigment called astaxanthin from eating an introduced species of crayfish. This dietary source even makes the beaks of nestlings appear bright red.

White storks are carnivores that hunt a diverse range of animal prey. They typically forage in grassy meadows, farmland, and shallow wetlands. They often find food among low vegetation or in shallow water. Their diet includes insects, fish, amphibians, reptiles, small mammals, and even small birds.

Because they prefer open areas, they tend to avoid regions overgrown with tall grass or thick shrubs. In some parts of Poland, the birds have even been known to forage at rubbish dumps. This change occurred because their natural foraging grounds became less available. Interestingly, researchers found that one third of breeding pairs in Poland had anthropogenic litter in their pellets.

These birds are remarkable long-distance migrants.

They breed in areas spanning from Europe north to Finland to northwestern Africa. They also inhabit regions in the Palearctic east, reaching southern Kazakhstan. During the winter, they migrate to Africa, ranging from Sub-Saharan regions down to South Africa. Some populations also winter on the Indian subcontinent. To travel between Europe and Africa, storks use specific land routes. They avoid crossing the Mediterranean Sea directly. This is because they depend on air thermals to soar. Thermals are columns of rising warm air that provide lift. Since these thermals do not form over large bodies of water, the storks detour via the Levant in the east or the Strait of Gibraltar in the west.

There are two recognized subspecies of the white stork.

The first is the nominate subspecies, Ciconia ciconia. This group breeds from Europe to northwestern Africa and western Asia. It winters mainly in Sub-Saharan Africa, though some birds go to India. The second subspecies is Ciconia asiatica, described by Nikolai Severtzov in 1873. This subspecies is slightly larger than the nominate type. It breeds in Turkestan and winters in regions ranging from Iran to India. The stork family itself is divided into three broad groups. These include the open-billed and wood storks, the giant storks, and the "typical" storks. The white stork is a member of the typical stork group, which includes six other species.

History shows that humans have deeply influenced the white stork's population.

During the Middle Ages, the clearing of woodlands for pastures actually helped the species. They benefited from the new open grasslands created for agriculture. However, the 19th and early 20th centuries brought different changes. Industrialization and new farming methods caused the storks to decline and disappear from parts of Europe. Fortunately, modern conservation and reintroduction programs have been successful. These efforts have helped the white stork resume breeding in countries like the Netherlands, Belgium, Switzerland, Sweden, and the United Kingdom. Today, the species is rated as "least concern" by the International Union for Conservation of Nature (IUCN).

Understanding the stork's history involves looking at both scientific discovery and ancient legends.

In the 17th century, the English naturalist Francis Willughby wrote about the bird. Later, Carl Linnaeus described the species in the 10th edition of Systema Naturae. In 1760, Mathurin Jacques Brisson reclassified the bird into the genus Ciconia. This genus name is derived from the Latin word for stork. Beyond science, the bird is a staple of folklore. One of the most famous legends across its range is the story of storks bringing babies to families.

White storks are also quite successful at raising their young through teamwork.

They are monogamous breeders, meaning they form a pair bond with one partner. Both parents work together to build a large nest made of sticks. These nests are sturdy enough to be used for several years. Each year, the female typically lays a clutch of four eggs. The parents take turns with incubation, which is the process of keeping the eggs warm. This stage lasts between 33 and 34 days. Once the eggs hatch, both parents help feed the chicks. The young birds leave the nest 58 to 64 days after hatching. They continue to receive food from their parents for another 7 to 20 days.