Inexplicata has the full story. A woman was traveling in the Rosario region of Argentina, when suddenly the cow incident occurred. She told Telenoche:
We went to have some mate with the kids, we were looking at the island and we were surprised to see some strange white thing flying. It was large. We made a close up with the camera and it was a cow flying, and above it, there was something like a flying saucer suspended in the air. It wasn’t a helicopter or an airplane. It seemed as if the cow was being sucked up by the flying saucer. Then they both vanished. I want to believe that’s what it was. To me, it was a UFO. I experienced it.
Still photo looks like a white bird turning and a blurred insect above right. Anyone find the video of this?