Overview
- Gardening specialists advise placing a few copper pennies in bird baths this summer to slow the spread of harmful bacteria and algae.
- Pre-1992 pennies are most effective because they contain 97% copper, though newer copper-plated coins still provide some benefit.
- The copper ions released into the water naturally inhibit algae growth, offering a bird-friendly alternative to chemical cleaners.
- Experts stress the importance of refilling baths every two days and scrubbing them thoroughly whenever algae returns to maintain clean water.
- Bird baths should be sited where visiting birds have clear visibility and nearby cover so they feel safe while drinking and bathing.