Chlamydia psittaci is a type of bacteria that primarily infects birds, especially parrots and pigeons. It can cause a disease known as psittacosis, which can be transmitted to humans through contact with infected birds or their droppings. Symptoms in humans may include fever, chills, and respiratory issues. In birds, Chlamydia psittaci can lead to severe respiratory illness and other health problems. The bacteria can survive in the environment for extended periods, making it important for bird owners to maintain good hygiene and monitor their pets for signs of illness. Early detection and treatment are crucial for both birds and humans.