Hundreds of thousands of migratory birds have been found dead in New Mexico

The Western wildfires could be one factor, a New Mexico biologist says, but something else is contributing to the deaths and they don't know what it is.

Hundreds of thousands of migratory birds have been found dead in New Mexico
The Western wildfires could be one factor, a New Mexico biologist says, but something else is contributing to the deaths and they don't know what it is.