“There could be a mutation that also infects people and turns into a mass disaster,” said Leshem, a zoologist at Tel Aviv University and director of the International Center for the Study of Bird Migration at Latrun.

So far, at least 5,400 wild cranes have died infected with the new H5N1 avian flu, which Israeli authorities fear could expand into a global emergency.

Of the 30,000 Eurasian cranes passing this winter at the Hula Nature Reserve, 17 percent are dead, and scientists fear the worst for their surviving brethren, at least 10,000 of which appear to be ailing. The infection of the cranes is the same strain of avian flu which infected chicken coops throughout northern Israel, and led to the cull in recent days of nearly 1 million birds.

Israelis will be without their beloved chicken schnitzel—and without eggs—until a supply chain of imported birds is established.