The world's largest species of owl by length was captured gulping a mouse down in northern China.

Video filmed in Hulunbuir city in Inner Mongolia Autonomous Region on July 18 shows a great grey owl catching a mouse and swallowing it in one gulp.

The great grey owl is one of the tallest owls with a big head and a large facial disk. It is on the list of national second-class protected animals in China.

A big-headed great grey owl carried an alive mouse around and suddenly swallowed it in northern China.

Footage captured in Hulunbuir city in Inner Mongolia Autonomous Region, China on July 18 shows a rare great grey owl swallowing a mouse in one gulp in the wild.

Chinese netizens are astonished by its abrupt swallow of a whole mouse with such a tiny bill.

The great grey owl is one of the tallest owls with a big head and a large facial disk, which is in the list of national second-class protected animals in China.