Tuosu Lake Wetland in Qaidam Basin attracts thousands of birds. Is it abnormal weather or natural migration?

This is a natural migration. 2021February 2 is the 25th? World Wetlands Day? The Crook Lake-Tuosu Lake Wetland Nature Reserve, located in the Qaidam Basin, also attracts the spectacular scenery where thousands of birds live. From Crook to the river course of Tuosu Lake, and then to the water inlet of Tuosu Lake, looking around, thousands of birds live, and beautiful swans stand out from the crowd, dotted with the lake. At the same time, nearly 10,000 wild birds such as the red-billed diving duck also live here.

I: Introduction to Tuo Su Hu Wetland Tuo Su Hu Wetland is located in two medium-sized lakes in Delingha inland basin at the eastern end of Qaidam Basin in Qinghai-Tibet Plateau and a large area of fresh water and brackish water swamp in the east. The two lakes are separated by a belt about 3 kilometers long and 3 kilometers wide, and the winding water is very calm. In addition to the groundwater and rainfall infiltrated by the surrounding mountains, the water mainly comes from the northeast. The lake originated from Bayinguoleng River and many gap rivers in the surrounding mountainous areas, and Tuosu Lake is located in the south of Crook Lake. Its water source comes from Crook Lake, which is a closed lake with salt accumulation and alkaline water. On the water surface 4.6 and 6. 1 km away from the lake, there are two islands with an area of 13 hectares and 370 hectares respectively, and the lake is surrounded by a Gobi desert.

2. Tuo Su Hu Wetland Climate Tuo Su Hu Wetland belongs to desert and semi-desert continental climate, with warm summer climate and little rain. The average temperature in July is 16.7 degrees Celsius, the extreme maximum temperature is 33. 1 degrees Celsius, the annual average temperature is 3 degrees Celsius, and the sunshine time is long, and the annual sunshine can reach 33,535 hours. The annual radiation is 173 kcal per square centimeter, the annual precipitation is 100 mm, and the frost-free period is generally 84 to 99 days.

Three: The main organisms in Tuo Su Hu wetland are brown-headed gull, crested duck, red-billed duck, striped goose, gray goose and crested duck, but the number of black-necked crane, swan, snub-nosed duck and crested duck is small. Among them, striped goose, gray goose, crested duck, black-necked crane and crested duck only inhabit Crooke Lake area, and brown-headed gull. Birds that inhabit Lake Tuosu basically nest on the second island.