A massive flock of crows hovered above a highway in eastern China.

Video filmed in the city of Nanjing in Jiangsu Province on February 8 shows hundreds of crows hovering around in the air when cars were moving along the highway.

Some people thought it could be a sign of an impending disaster, such as an earthquake.

Li Li, the head of the Black Panther Wildlife Protection Station, stated that the birds in the video were little-billed crows and they like to engage in group activities.

According to Li, it is in the nature of these birds to gather in large flocks in open spaces to search for food and they return to the warmer city areas to avoid the cold at night, which results in large-scale migration.

The video was provided by local media with permission.

2月8日，在江苏南京一高速路段，天空出现大片乌鸦，鸟群密密麻麻飞行场面壮观，有人看到视频后怀疑为地震等灾害前兆。黑豹野生动物保护站站长李理表示，画面中的鸟为小嘴乌鸦，其特性喜欢集群活动，网上称不好的兆头或为灾害前兆等，均为谣言。李理称这种鸟天性就是喜欢集大群在旷野中觅食，然后傍晚或者晚上的时候，要回到城市附近比较暖和的地方去躲避严寒，所以就会出现一个大规模的迁徙的情况。