Now four years later, a dozen eggs costs an average of nearly $5 in the U.S. because of the lingering bird flu, so Nevada ...

Bird flu was recently detected in milk produced by an Arizona dairy herd for the first time, officials announced Friday.

A dairy facility in Maricopa County has been placed under quarantine after avian flu was detected in its milk supply, the agriculture department said.

Arizona agricultural officials say they now have the first detection of H5N1 avian influenza in milk produced by a dairy herd within the state.

With threats of avian flu and lead poisoning, biologists are working overtime to care for a species that nearly went extinct.