Songbird Outbreak

June 17, 2021

Question: Earlier this year I read about the salmonellosis outbreak causing songbird deaths in several areas throughout the state. The California Department of Fish and Wildlife (CDFW) asked the public to remove bird feeders to reduce disease transmission. What’s the status of the outbreak? Can we use our bird feeders again?

Answer: The good news is that the salmonellosis outbreak appears to have subsided and it’s probably safe to resume feeding if residents choose to do so. However, CDFW would like residents to continue keeping an eye on feeders because there have been reports of a bacterial infection in house finches. The infection, Avian Mycoplasmosis, causes swollen eyes and an upper respiratory infection. Sick birds may act similar to those infected with salmonellosis. Mycoplasmosis spreads readily at bird feeders, especially tube feeders that require birds to reach their head into the hole to grab seeds. Because of these new reports, CDFW is asking residents to remain vigilant in monitoring feeders and bird baths. If sick or dead birds are seen at the feeders or bird baths, they should be removed for at least three to four weeks. This will hopefully encourage the birds to feed on more natural foods and slow the spread of any infections. Also, it’s generally recommended that bird feeders and bird baths are thoroughly cleaned outdoors at least once a week, and more often if there is heavy use by birds.