Returning season of migratory birds Black-necked cranes wintering in Tibet are moving to their breeding grounds

2022-06-07 0 By

Seasons change, when spring comes, another crop of highland barley in the farmland out of the bud, the winter in my area of migratory birds to set off again, back to the remote grassland in northern Tibet began to “have children”.Our old friend, the black-necked crane, is also on the move.Recently, the reporter learned from the forest and grass bureau of the autonomous region, at present in my area of the winter of two thirds of the migratory birds have flown away, is expected to fly away in mid-April.At present, a large number of black-necked cranes wintering in our area are migrating in groups from the wintering site to the breeding area.Gradually establish their respective areas into mating period.As spring turns to winter, they follow a fixed route.The reporter learned that the breeding grounds of black-necked cranes in our region are mainly concentrated in the rivers and marshes in the north and northwest, mainly in The Southern Qiangtang centering on Nagqu Shenza and Bangor counties, with an average altitude of 4,500 meters above sea level.Their breeding season begins in early April, often mating between morning and noon, and eggs are laid in May.The mating activity of black-necked cranes lasts for nearly a month, so they finish laying eggs from late April to early May every year, according to black-necked crane researchers at the Plateau Biology Institute of the Autonomous Region.If it is too late, it can affect the growth of nestlings and their ability to migrate back to their wintering grounds.They usually lay 1-2 eggs, with a maximum of 3 eggs, but they are rare.At the moment, black-necked cranes are still seen in groups, but they disperse in twos and threes once they reach their breeding grounds.This is because during the breeding season, the offspring need to be provided with more food and nutrients, which can be spread out to avoid competing for limited food and to conserve energy.The reporter learned from the Naqu Forest and Grass Bureau that the number of black-necked cranes currently arriving at the breeding ground is not particularly large, and they have been separated, and it is almost difficult to find their trace.”It is estimated that we will have to wait a week or so before all of them can fly back. The temperature here is not high, so few of them come back.”That qu city forest grass bureau related person in charge told reporters.So migratory birds fly away do not need to feed every day, every day patrol?”At present, more than half of the black-necked cranes in Linzhou county have flown away and feeding work has been stopped, but the rangers are still on patrol every day because spring is the peak season of various viruses. To ensure the smooth return of black-necked cranes to their breeding grounds, the rangers have to strengthen patrol and monitoring every day.”Spring is also the peak season for illegal hunting and trading of wild animals such as birds, said Zhang Jiaping, director of the wildlife protection department of the Forestry and Grass Bureau of the autonomous Region.