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A crane is a machine used to move materials both vertically and horizontally, utilizing a system of a boom, hoist, wire ropes or chains, ...
The cranes' beauty and spectacular mating dances have made them highly symbolic birds in many cultures with records dating back to ancient times. Crane mythology can be found in cultures around the world, from India to the Aegean, Arabia, China, Korea, Japan, Australia, and North America.
The common crane (Grus grus), also known as the Eurasian crane, is a bird of the family Gruidae, the cranes.A medium-sized species, it is the only crane commonly found in Europe besides the demoiselle crane (Grus virgo) and the Siberian crane (Leucogeranus leucogeranus) that only are regular in the far eastern part of the continent.
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]
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.
Sandhill cranes are known to frequent the edges of bodies of water. The central Platte River valley in Nebraska is the most important stopover area for the nominotypical subspecies, the lesser sandhill crane (A. c. canadensis), with up to 450,000 of these birds migrating through annually. [3] [4]
It weighs 2–3 kg (4.4–6.6 lb). It is the smallest species of crane. [13] [14] The demoiselle crane is slightly smaller than the common crane but has similar plumage. It has a long white neck stripe and the black on the foreneck extends down over the chest in a plume. It has a loud trumpeting call, higher-pitched than the common crane. Like ...
A treadwheel crane survives at Harwich, Essex, United Kingdom. It was built in 1667 and formerly stood in the Naval Yard. It was moved to Harwich Green in 1932. The crane has two treadwheels of 16 feet (4.88 m) diameter by 3 feet 10 inches (1.17 m) wide on an axle 13 + 1 ⁄ 2 inches (340 mm) diameter.