There's no sign yet of any bird flu outbreak in Alaska, according to government scientists who have begun sampling and testing migratory flocks in western and northwest Alaska.

Officials in Washington had predicted that infected birds might show up in Alaska by late April or early May.

But scientists in Alaska tell ABC News the migratory flocks are arriving later than expected this year and large scale testing may not begin until July.

Scientists believe the flocks in the pacific flyway may carry the deadly virus to the lower 48 states after mingling with infected flocks from Asia.