What is going on with my mouth always opens my mouth?

It is normal for gray birds to open their mouths because it needs to heat dissipation.Pay attention to sun protection in summer, and at the same time ventilation. You can take a bath once a day. There are many benefits to bathing. In addition to cooling down, you can also clean your body.Do not put it back into the cage immediately after washing, so as not to cause the bird to be frozen and suffer from disease.You can put it in the place where the sun is first, and then put it back to the sun, but you can't take it too long, otherwise the birds will heat up of the heat stroke.