The general public, however, can continue using bird feeders, Hofmann said. Delaware bird feeders typically attract cardinals, chickadees, titmice and other songbirds, while bird flu is usually found in waterfowl, raptors and vultures.

The rise of bird flu across farms in California has raised questions about the virus and its potential threat to humans. While the threat to humans is currently small.

Delaware officials announced its first positive case of H5 avian influenza, from a commercial poultry flock in Kent County.