Mesmerising footage shows herons standing motionless in flowing lake

Watch the mesmerising moment a group of herons stand motionless in a flowing lake - "like soldiers standing to attention."

Scattered across the water, the birds hold their rigid positions as the gentle current flows around them.

The video was filmed on March 11 in Chengdu, Sichuan province, China, after the mesmerizing scene drew crowds.

Some speculated that the birds were simply feeling the movement of the water, while others wondered what they were waiting for.

One witness likened them to "soldiers standing to attention".