Why must clean water be changed frequently for an Eclectus parrot?

Because they frequently play or bathe in the water bowls.

Although clean, fresh water is undeniably vital for the Eclectus parrot's overall hydration, which is supported by their naturally high-moisture wild diet, the necessity for frequent changes goes beyond simple drinking. Eclectus parrots are known to be quite enthusiastic about interacting with their water dishes, often using them as a means for play, splashing, or even bathing. This activity rapidly contaminates the water with food particles, saliva, and droppings. If the water is not changed frequently throughout the day, this contamination creates an environment where bacterial growth flourishes, posing a significant health risk to the bird. Monitoring the soiled state of the water provides a good visual cue regarding how much the bird is using the water for purposes other than drinking.