As it turns out, this peculiar aerial phenomenon actually has a conventional explanation.
Captured on camera last week from a farm in Argentina's Tucuman province, this unnatural looking black ring, which looks almost like a giant smoke ring, is certainly not something you see every day.
The footage quickly attracted attention on social media where users were left scratching their heads.
Some suggested that the ring was smoke from some sort of fire, while others put forward the notion that the video showed evidence of an extraterrestrial spacecraft.
In truth, however, there is a conventional explanation for this particular phenomenon.
The ring, as it turns out, is in fact a swarm of mosquitoes.
If you look closely at the video (below), you can see the insects milling around in large clouds beyond the actual ring formation.
Similar mosquito swarms have prompted UFO reports in other parts of the world over the years.
It is believed that the insects fly in such formations as part of their mating rituals.