Diffusing Essential Oils Around Birds
"Diffusion from one of the water-based diffusers is recommended for use in households with birds. Air diffusers can be utilized, however require a farther distance from the bird, or use in much larger room. Almost every essential oil single and blend has been diffused from a water diffuser around birds. Monitor the bird(s) closely for the first 5-10 minutes of diffusion. Increase amounts and frequency of diffusion gradually, and most homes find that they can diffuse on an almost continual basis - bringing amazing health and benefits to their birds."
From the Animal Desk Reference by Melissa Shelton DVM, page 251