More red-winged blackbirds have fallen from the sky, this time in Louisiana. 

In a television report, a reporter stated that the birds in Arkansas were startled by fireworks and flew wildly in the dark and crashed into buildings and other objects. They died of internal injuries. The explanation for the same type of birds involved in both Arkansas and Louisiana is that blackbirds are very common this time of the year. They typically form large flocks. See here.

Infowars on the mass wildlife deaths in Arkansas: "Electromagnetic scalar weapons that can artificially manipulate the environment could be responsible for the mass die offs. We know for a fact that over a decade ago the U.S. Military Industrial Complex was aware of and involved in the testing of such technology."

Or maybe space aliens? 

Arkansas has had two unexplained massive deaths of wildlife recently. First at Beebe as many as perhaps 5,000 red-winged blackbirds fell from the sky on Christmas eve, dead. Then a large fish kill occurred near Ozark on the Arkansas River. Disease is suspect in the latter incident, but mysteriously only drum fish were affected. No one seems to know the reason for the bird kill, but biologists point to stress from either fireworks or weather.

Must be some kind of omen or a plague.