Parrot fever is a common disease caused by parrot's long-term exposure to high temperature and high humidity, which can't dissipate heat normally. The following are several indicators to judge whether parrots have psittacosis:

1. Shortness of breath: The parrot is short of breath in a hot environment, and even has asthma or dyspnea.

2. Loose feathers: After heating, the parrot's feathers will become loose and dull, and it seems that there is no active self-care.

3. Like to peck at ice or water: When parrot is hot, it will peck at ice or drink water frequently to dissipate heat.

It is difficult to fly with wings: parrots will feel tired and weak in hot environment and can't fly as usual.

5. Tired and weak: The parrot will feel tired and weak after being heated, and seems to have no energy and interest to do other things.

If one or more of the above symptoms appear, the parrot should be moved to the shade in time and supplemented with enough water and nutrition. If the symptoms are serious, the parrot should be sent to a pet hospital for treatment. A better way is to prevent parrot fever, try to provide suitable temperature and humidity for parrots, avoid high temperature and high humidity environment, and observe the state of parrots regularly.