Several paranormal and alien websites claim to have obtained footage of bizarre entities drifting through the sky amid claims they are biological organisms.
In the latest clip, said to have been recorded in Mexico, a translucent light blue object has been described as moving "like a living, breathing animal" and almost swimming through the sky.
The footage, apparently recorded above Guadalajara, was uploaded to YouTube on May 3.
To read more and view the video, click here.