Nests serve as the reliable house for birds. In them birds hatch out posterity, disappear from dangers. The sizes of separate nests so big that in them several people can be located.
Glazchaty Australian chickenOn construction of the most volume nests glazchaty Australian chickens are considered as champions. Despite the name, they have nothing in common with ordinary hens and are externally similar to pheasants. Birds possess grayish and motley plumage, their size approximately about a turkey. Birds live mainly in that part of Australia where bushes and droughty soils prevail therefore their nests look is rather specific. The design of an incubator reminds the hill with deepening, its height fluctuates from 4th to 5 meters, and diameter can reach 13 meters.
Ornithologists claim that if to make calculation of the natural materials which left on construction of a nesting ground, then there will be about 3 tons of weight and 250 cubic meters of volume.
It is interesting that the male is engaged in all construction works, bringing dry leaves and a grass which have to decay with arrival of rains in the dug hole. The father of bird's family himself decides when the female can use a nest, he continuously watches its state and temperature in an incubator.
White-headed sea eagle
After all nests of glazchaty Australian hens are very unusual, considering their land location. But if to hold a competition among the birds building nests of a habitual sample, then white-headed sea eagles will be undoubted winners. Results of their persistent works are confirmed in the Guinness Book of Records. Feathery couple chooses for housing top of a big shady tree or the steady platform on the rock, near any reservoir. They in common construct a nest from branches, sticks, other similar materials, regularly strengthening its durability. Such dwelling will serve it several years.
The bowl-shaped nest of a golden eagle reaches weighing 2-3 tons, at the same time its diameter - 2-3 meters, and height - 4-6 meters.
Golden eagleBy right golden eagles got the third place. These large birds of prey prefer to lodge on the outskirts of the wood, near open spaces whom conveniently to hunt. Couple of golden eagles usually build several nests and lives in them serially. The nest consists of boughs and various sticks, and from within is covered by a moss and a grass, sometimes even skins of the caught rodents. Golden eagles keep the residence clean, especially caring for a fresh laying during reproduction. The nest is fixed on thick branches and forks of trees. The average sizes of such nest - 1.5 m in width and 1.5 m in height, and are yet not a limit. The big sizes of nests of a golden eagle are known - to 4 meters in depth.