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. Owner Doug Corwin said Friday that the destruction of about 100,000 birds on the now-quarantined site has been completed. He said his remaining staff will then thoroughly sanitize the site, a process that could take months. Long Island had once been a center of U.S. duck production with more than 100 farms.