Dead birds were found in Arkansas and Sweden, and not simply a bird but flocks full.  Whether it was from weather or illness or combination of external events, scientists are still testing.  This has been a foreboding told in the former series Flash Forward where the deaths of murders of crows gave a foretelling that the flash forward was originated from.

In Sweden, 50 to 100 jackdaws, a species of the crow family, fell dead in the city of Falkoping.

In Arkansas, thousands of birds were killed supposedly from disorienting fireworks and collided into homes, cars and each other.

In Louisiana, power lines supposedly killed 450 birds in the rural community of Pointe Coupee Parish of Labarre.  The birds were a combination of red-winged blackbirds, brown-headed cowbirds, grackles and starlings.

Mass bird deaths are quite frequent.  About 90 mass deaths, according the U.S. Geological Service website, have occurred from June through December 12, 2010.

Regarding these bird deaths, most likely it could have been environmental.  Whether exposure to chemicals  in water or quite possibly to noise or low-flying aircraft, these elements could have possibly disoriented these birds. If something more extreme that could possible these deaths, it could have been a distortion in the Earth’s magnetism, and these could have affected these birds orientation.  But all this is speculation until the scientists perform toxicology and perform autopsies on these birds.  Hopefully, all these deaths have a common thread, as it could expose something harmful in nature.