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The species with the smallest estimated population is the whooping crane, which is conservatively thought to number 50–249 mature individuals, [5] and the one with the largest is the sandhill crane, which has an estimated population of 450,000–550,000 mature individuals.
There are about 100 hooded cranes wintering in Chongming Dongtan, Shanghai every year. Dongtan Nature Reserve is the largest natural wintering site in the world. In December 2011, a hooded crane was seen overwintering at the Hiwassee Refuge in southeastern Tennessee, well outside its normal range. [ 3 ]
Of the four crane genera, Balearica (two species) is restricted to Africa, and Leucogeranus (one species) is restricted to Asia; the other two genera, Grus (including Anthropoides and Bugeranus) and Antigone, are both widespread. [5] [1] Many species of cranes are dependent on wetlands and grasslands, and most species nest in shallow wetlands.
Gruiform means "crane-like". Traditionally, a number of wading and terrestrial bird families that did not seem to belong to any other order were classified together as Gruiformes. These include 15 species of large cranes , about 145 species of smaller crakes and rails , as well as a variety of families comprising one to three species , such as ...
However, North America's other crane species, the whooping crane, is endangered. Only about 80-to-85 whooping cranes currently live in Wisconsin, Lacy said. Only about 80-to-85 whooping cranes ...
The taxonomic treatment [3] (designation and sequence of orders, families and species) and nomenclature (common and scientific names) used in the accompanying bird lists adheres to the conventions of the AOS's (2019) Check-list of North American Birds, the recognized scientific authority on the taxonomy and nomenclature of North America birds.
The crane is carved in a South Korean 500 won coin. In Korea, the red-crowned crane is called durumi or hak and it is considered a symbol of longevity, purity, and peace. Korean seonbis regarded the bird as an icon of their constancy. The red-crowned crane is depicted on the South Korean 500 won coin and is the symbol of Incheon.
Grey crowned crane with nest in Hellabrunn Zoo, Munich. Grey crowned cranes time their breeding season around the rains, although the effect varies geographically. In East Africa the species breeds year-round, but most frequently during the drier periods, whereas in Southern Africa the breeding season is timed to coincide with the rains. [4]