The common crane, known scientifically as Grus grus and also referred to as the Eurasian crane, is a majestic bird belonging to the Gruidae family. This medium-sized crane is the only species commonly found in Europe, apart from the demoiselle crane and the Siberian crane, which are primarily seen in the continent's far eastern regions. The common crane is distinguished by its slate-grey plumage, blackish forehead, lores, and a striking bare red crown. A white streak extends from behind the eyes to the upper back, setting it apart from similar species.
Adult common cranes measure between 100–130 cm in length and boast a wingspan of 180–240 cm. Their body weight ranges from 3 to 6.1 kg, with males typically larger and heavier than females. The species exhibits sexual size dimorphism, most notably in weight and wing length. Juveniles can be identified by their yellowish-brown feather tips and lack of adult coloration, including the drooping wing feathers and bright neck pattern.
The common crane's breeding range spans Europe and the Palearctic to Siberia, with significant populations in Russia, Finland, and Sweden. It migrates to wintering grounds in Portugal, Spain, northern Africa, and parts of Asia, including China and the Indian subcontinent.
These cranes are social birds outside the breeding season, forming flocks that can number up to 400 individuals. They engage in a spectacular dancing display, which includes leaping with wings uplifted. This behavior serves complex social functions and can occur at any time of year.
The common crane's call is a loud, trumpeting sound that can be heard from great distances. It is typically given in flight and during their display dances.
Common cranes are monogamous and may form pair bonds that last for many years. They engage in elaborate courtship rituals each spring, which include synchronized calls and dances. Nests are built in or near shallow water, and the clutch usually contains two eggs. Both parents are fiercely protective of their nest and young.
The common crane can be confused with the hooded and black-necked cranes of Asia, but its unique coloration and display behaviors are distinguishing features.
Omnivorous in nature, common cranes feed on a variety of plant and animal matter. Their diet includes roots, seeds, berries, insects, and small vertebrates. They forage in small groups, benefiting farmers by consuming waste grain in fields.
The common crane is classified as Least Concern by the IUCN, with a global population estimated at around 500,000 individuals. However, habitat loss and degradation pose significant threats to the species, leading to local extinctions and conservation efforts, such as reintroduction projects in the United Kingdom.
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