What's wrong with the four happy birds open mouth?

Sixi birds often open their mouths due to the hot climate.High temperature is very harmful to the birds. In addition to avoiding the sun, it is best to strengthen air circulation. It is not easy to heatstroke in good ventilation.You can take a bath every day and put the water bath in the water in the cage. The birds will wash themselves. After washing, take it out. At the same time, it should be dried in time. Do not wait for natural air drying, otherwise it is easy to catch a cold.