A tourist visiting the "Bat Caves" of Phnom Sampov, near Battambang, Cambodia, caught a cloud of thousands of bats streaming out at sunset.
The filmer commented: "Everyday, around sunset, those bats soar out of the cave, to go hunting for the night, up to 50km away, offering an impressive show, that lasted 24 long minutes when I was there!
"Impossible to count them indeed, but everybody agrees that at the very least there are hundreds of thousands of them, while many experts even believe it would be in the millions!"