The highly infectious H5N1 strain has caused outbreaks across the country. Now, Long Island’s last duck farm must kill its entire flock and may go out of business, its owner said.

A New York region once synonymous in the culinary world for duck may lose its last commercial farm. Crescent Duck Farm on Long Island’s North Fork was struck by an outbreak of bird flu, prompting health officials to order the destruction of its entire flock this week.