Bird feeders can spread disease to local birds.

Bird feeders can concentrate and spread infections among visiting wild birds; common illnesses named include salmonellosis, aspergillosis, avian pox, trichomonosis, and mycoplasmosis.

Bird feeders are widely used to attract and support wild birds and offer a way for people to observe local wildlife. Because feeders draw many birds into close proximity, they can become focal points for disease transmission. The article reports that a single feeder can amplify spread when contaminated surfaces, saliva, or fecal material pass infection between visitors. Wildlife health experts have highlighted this concentration of contact as a factor that can disproportionately affect local bird communities. Key facts: - Five diseases most commonly linked with feeder-associated cases are salmonellosis, aspergillosis, avian pox, trichomonosis, and mycoplasmosis. - Mycoplasmosis often presents with conjunctivitis and crusty eyes; avian pox can produce wart-like external lesions and internal throat lesions; aspergillosis affects the respiratory system; salmonella can cause lethargy. - Disease transmission at feeders can occur via oral contact, contaminated surfaces, and accumulated fecal matter beneath feeding areas. - The article reports experts recommend regular cleaning of feeders; a cited approach is weekly disinfection using a 10% bleach solution followed by air drying. - Removing seed hulls and fecal debris from beneath feeders is noted as important, with the article mentioning raking the area multiple times per week when detritus accumulates. - Placing multiple feeders several feet apart and keeping stored seed dry and sealed are described as measures that reduce conditions that encourage fungal or bacterial growth. Summary: Concentrated bird activity at feeders can increase the risk that infections move through local bird populations, potentially affecting many individuals. The source reports specific visible signs to watch for, lists common diseases associated with feeders, and presents maintenance practices cited by experts—such as routine disinfection, debris removal, spacing of feeders, and storing seed dry—as ways to reduce transmission. Monitoring feeder conditions and bird health is described as part of ongoing attention to local avian wellbeing.