State Grid workers are installing artificial bird nests in safe areas on transmission towers. China is one of the countries with the richest bird resources in the world and an important channel for cross-border migration of migratory birds worldwide. Among the nine major migration channels for migratory birds worldwide, four of them pass through China. China has the world's largest power system, with transmission lines of 35 kV and above exceeding 2.26 million kilometers in length. How to ensure power supply while allowing birds to safely reside, reproduce and thrive in places such as transmission towers, and promote harmonious coexistence between humans and nature? The reporter conducted an interview. Building artificial bird nests to guide birds to reproduce and thrive in safe areas, accelerating and diving, and capturing prey with the sharp claws of a raptor. After finishing the meal, it circled and landed on a power transmission tower, with a 110 kV high-voltage line passing through the tower. At the top corner of the tower, the artificial bird's nest woven from vines is the home of this raptor. This is Ruoergai County, Aba Tibetan and Qiang Autonomous Prefecture, Sichuan Province. In this area with an average altitude of about 3500 meters, staff from Aba Power Supply Company of State Grid Sichuan Electric Power Company have built artificial bird nests for prey such as falcons and black kites. Their behaviors such as hatching, feeding, and nurturing young birds are also recorded by high-definition cameras and transmitted back to the power supply company, providing a large amount of first-hand information to strengthen the protection of birds. "Ruoergai Wetland is rich in water and grass, with over 200 species of birds living here. In the past, they often carried materials such as iron wire and cow hair to build nests on transmission towers. Bird related faults have become the third cause of power line tripping in addition to lightning strikes and external damage." Liu Yong, Director of the Digital Work Department of Aba Power Supply Company, introduced. The grassland lacks tall trees, and power transmission towers have become the preferred choice for many birds to build nests. In the past, anti bird and bird repellent devices were often installed in towers to prevent birds from staying, but the effect was not satisfactory. Electricity workers ponder that "blocking" is better than "dredging". Can artificial bird nests be built to guide birds to build and move in safe locations? Last April, Aba Power Supply Company installed 32 artificial bird nests and 14 sets of high-definition video devices on the 110 kV Ruozhen line. In response to the problem of large birds touching exposed live wires when moving on the top of the tower, local insulation treatment was also applied to the tower body. "The artificial bird's nest we create is comfortable and spacious, and the installation location is also exquisite. It is usually arranged in the non electrified section of the transmission tower to guide birds to move within a safe range, ensuring the safety of both birds and the power grid," said Liu Yong. In Kekexili, Qinghai, power workers are constantly upgrading the materials used to build artificial bird nests. "At first, we laid straw in bamboo baskets to make a bird's nest, but in the Kekexili area, the wind and sand were strong, and the straw was easily blown away. The bamboo baskets were also prone to weathering and damage," said Tian Long, the leader of the Electric Power Tianlu Operation and Maintenance Team of State Grid Qinghai Electric Power Maintenance Company. Tian Long said, "Later on, we tried to replace straw with coconut brown mats, bamboo strips with willow strips, and tightly tie them together with fine iron wire. Later, we upgraded the weaving material to rattan strips and soaked them in anti-corrosion solution in advance to further enhance the durability of the bird's nest." According to a person in charge of State Grid Corporation of China, since 2016, State Grid has launched the "Life Bird's Nest" public welfare project
Edit：Luo yu Responsible editor：Wang er dong
Source：people.cn
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