An unprecedented number of migratory birds were found dead across a number of states in Western America.

Videos that are shared on social media show the birds lying dead on the ground.

Most of the birds died in New Mexico and states that are near it.

AustieJFish, a user on Twitter, short clip on Monday along with the caption: “I just recorded this up in Velarde, N.M. I’ve never seen anything like it. I’m told of other dead migratory birds found in Hernandez, Ojo Sarco and El Valle de Arroyo Seco.”

I just recorded this up in Velarde, N.M. I've never seen anything like it. I'm told of other dead migratory birds found in Hernandez, Ojo Sarco and El Valle de Arroyo Seco. https://t.co/GpeFZbyuW7 pic.twitter.com/XXVM4AZrDu

— objectivity haver (@austieJFish) September 14, 2020

Experts are saying that hundreds of thousands or millions of migratory birds have dropped dead out of the sky.

Wildlife experts are stunned with the phenomenon and are looking into possible causes that could have resulted in death.

Martha Desmond, a professor that studies birds at New Mexico State University’s Department of Fish, Wildlife, and Conservation Ecology, released a statement about the incident and said that millions of migratory birds are dying.

The most affected birds in the incident are the ones that eat insects.

Warblers, swallows, and bluebirds are the most seen birds that died.

She added:

A lot of these species, they’re already in trouble and they’re experiencing declines. And then to have this type of event occur on top of it, it’s devastating.

A team of experts is currently working together to work out and find the exact cause of the deaths.

They believe early cold snap can be the reason behind the mass deaths of the birds.

Professor Martha Desmond said:

It could be that the weather moved it and pushed birds out early in Colorado where it just snowed like crazy. Some of them might not have been ready to migrate and so they died in place.

Another thing that they believe could be the cause of the deaths is the fact that there are ravaging wildfires in the states of California and California.

Experts believe that the wildfires could have changed the migratory routes of the birds.