Should I Worry About Bird Flu in My Backyard Flock?
Should I Worry About Bird Flu in My Backyard Flock?
You should take it seriously, but informed precaution is more useful than worry. According to the USDA Animal and Plant Health Inspection Service (APHIS), highly pathogenic avian influenza (HPAI) has been confirmed in backyard and commercial flocks across multiple U.S. states, including California, since 2022. The risk to backyard flocks is real, particularly during fall and spring when wild bird migration peaks.
In Santa Cruz County, we live along the Pacific Flyway, one of the major migratory routes for wild waterfowl. Wild ducks and geese can carry HPAI without showing symptoms. According to CDFA (California Department of Food and Agriculture), the primary route of transmission to backyard flocks is contact with wild bird droppings, feathers, or contaminated water sources.
This is especially relevant if you keep ducks or geese, as wild waterfowl are more likely to land near or interact with domestic waterfowl. Our mixed flock in Boulder Creek includes ducks and a goose, so this is something we pay close attention to during migration season.
The most important protective measures are biosecurity basics. Keep your flock in an enclosed run (covered on top) to prevent direct contact with wild birds. Do not allow wild birds to access your flock's food or water. If you have a pond or water feature your ducks use, make sure it is inside the enclosed run area rather than open to wild bird access. Change footwear or use boot covers before entering the run if you have been walking in areas where wild waterfowl are present.
UC Davis Veterinary Medicine recommends watching for sudden changes in your flock: unexpected deaths, a sharp drop in egg production, nasal discharge, swollen heads or eyes, purple discoloration of combs and wattles, or severe lethargy. HPAI can kill birds quickly, sometimes within 48 hours of the first symptoms.
If you suspect HPAI in your flock, do not wait. Contact the CDFA sick bird hotline at 866-922-2473 or your local USDA Veterinary Services office. Do not move any birds. Testing is free for suspected HPAI cases.
The risk to humans remains low. The CDC notes that no sustained human-to-human transmission of HPAI has been documented. However, avoid handling sick or dead wild birds, and always wash hands thoroughly after interacting with your flock.
This is not a reason to panic or give up keeping birds. It is a reason to maintain good biosecurity habits year-round, especially during migration seasons (October through December and March through May).
This week: Confirm that your run is fully covered on top to prevent wild bird access. Check that wild birds cannot reach your flock's food or water sources. Save the CDFA hotline number (866-922-2473) in your phone.
