Swarms of mayflies causes chaotic scenes in Hanshou, Hunan Province, as they descended on a bridge.

Footage from September 1 shows the insects crashing into vehicles sounding like hailstones.

According to eyewitnesses, the mayflies were drawn to the bridge by the streetlights, covering almost the entire surface. When their bodies were crushed by vehicles, they became sticky, making the bridge dangerously slippery. This caused several cars to skid, resulting in rear-end collisions and other accidents.

In response to this emergency, the Hanshou County government quickly activated an emergency plan. Traffic police arrived on the scene to direct traffic and prevent further accidents, while sanitation and urban management departments dispatched personnel and equipment to clean the bridge. After several hours of work, the mayflies were cleared, and traffic gradually returned to normal.

Experts explain that mayflies are aquatic insects that require high-quality water environments. Their large numbers often indicate good local water quality and ecological conditions.

The mayflies gathering on the Yuan River Bridge may be related to the water quality and environment in the area. Mayflies have a very short lifespan, and they swarm together for mating and laying eggs, so while this phenomenon is rare, it is also understandable.

9月1日晚，湖南汉寿的沅水大桥上，大量蜉蝣聚集，天空中密密麻麻，桥面上也像铺了一层雪，导致路面滑腻，引发了多起交通事故。

据目击者描述，夜晚时分，这些蜉蝣在路灯的照射下纷纷飞向桥面，数量之多几乎将桥面完全覆盖。由于蜉蝣的尸体被车辆碾压后变得黏稠，桥面变得异常滑腻，导致多辆汽车在行驶过程中出现打滑现象，甚至发生了追尾和碰撞事故。

面对这一紧急情况，汉寿县政府迅速启动了应急预案。交警部门第一时间到达现场，指挥交通，防止事故进一步恶化。同时，环卫和城管等部门也紧急调派人员和设备，对桥面上的蜉蝣进行清理。经过几个小时的努力，桥面上的蜉蝣终于被清理干净，交通也逐渐恢复了正常。

据专家介绍，蜉蝣是一种水生昆虫，对水体环境有着极高的要求。它们的大量出现，往往意味着当地的水质和生态环境较好。此次蜉蝣聚集在沅水大桥上，可能与该区域的水质和生态环境有关。蜉蝣的生命周期非常短暂，它们聚集在一起是为了交配和产卵，因此这种现象虽然罕见，但也在情理之中。

湖南汉寿大桥蜉蝣聚集 引发交通事故

On the evening of September 1, a large swarm of mayflies gathered on the Yuan River Bridge in Hanshou, Hunan, filling the sky and covering the bridge surface like a layer of snow. This created slippery conditions that led to multiple traffic accidents.

According to eyewitnesses, the mayflies were drawn to the bridge by the streetlights, covering almost the entire surface. When their bodies were crushed by vehicles, they became sticky, making the bridge dangerously slippery. This caused several cars to skid, resulting in rear-end collisions and other accidents.

In response to this emergency, the Hanshou County government quickly activated an emergency plan. Traffic police arrived on the scene to direct traffic and prevent further accidents, while sanitation and urban management departments dispatched personnel and equipment to clean the bridge. After several hours of work, the mayflies were cleared, and traffic gradually returned to normal.

Experts explain that mayflies are aquatic insects that require high-quality water environments. Their large numbers often indicate good local water quality and ecological conditions. The mayflies gathering on the Yuan River Bridge may be related to the water quality and environment in the area. Mayflies have a very short lifespan, and they swarm together for mating and laying eggs, so while this phenomenon is rare, it is also understandable.

Mayfly Swarm on Hunan's Hanshou Bridge Causes Traffic Accidents


Swarm of flies sounds like hail as insects crash against vehicles and create