A mysterious flock of birds fell from the sky in Mexico, with a few dying after crashing into the sidewalk below. The security recording that became a virus for the strange nature of the incident showed how hundreds of yellow-headed blackbird seemed to die on February 7. According to local news outlets El Heraldo de Chihuahua, who first reported the story, a resident of Chihuahua in Mexico called the police after finding dead birds on the sidewalk.
Sectional police from Alvaro Obregon reported that they began to receive calls about dead birds at around 8:20 a.m. on Monday.

Records from security cameras showed a flock of birds down over houses in a large black vortex. While some Blackbird managed to fly, some fell dead. Videos show birds lying lifeless on the streets.

Records have been seen more than 1.4 million times on Twitter and shared widely on Facebook. The local authorities cannot immediately reveal why the mysterious birds fall from the sky – but viral videos gave rise to many theories.

According to USA today, one scoring veterinarian that the birds breathe toxic smoke, maybe from the heater, or set when perched on the power line. Some on social media also speculate that 5G can be the cause behind mysterious deaths.

But Dr. Richard Broughton, an ecologist with an Ecological Center & British Hydrology, told the Guardian blamed because the incident could lie with predatory birds.

“It looks like a Raptor like Peregrine or Eagle has pursued a flock of sheep, as they did by mumbling Starlings, and they fell when the herd was forced to be low,” he said. “You can see that they act like waves at the beginning, as if they were rinsed from above.”