What does a bird do when they are sad?

When birds are sad, they may exhibit changes in behavior such as decreased vocalization, reduced activity, or withdrawal from social interactions. They might also fluff up their feathers, spend more time alone, or engage in less grooming. In some cases, they may show signs of stress, like pacing or plucking feathers, indicating that they are not feeling well emotionally. Providing them with a stimulating environment and social interaction can help alleviate their sadness.