They've come to eat your GRAINS!

Folks in Moscow are on edge about strange pigeon deaths in the city. Citizens describe the pigeons in a zombie-like trance. The pigeons have been wandering around ignoring people and cars...then they drop dead.

Health officials say the birds all had an intestinal infection that is not dangerous to humans. However, some say it's more than a birdy belly bug. Various sources say the birds could be dying from Newcastle disease, salmonella or avian flu. Others say it's just what happens to pigeons after mating season.

As a zombie expert, think they just can't handle their vodka.