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 major bird flu outbreak has hit a Suffolk County poultry farm. Dozens of state and federal agricultural workers dressed in biohazard suits, sanitized boots and gloves were assisting Wednesday in the euthanizing of an entire flock of 100,