👉 The term "avian fauna" is used in zoology to refer to all living vertebrates, including birds, mammals, and reptiles. It encompasses not only animals that are known for their ability to fly but also those that have evolved from earlier flightless ancestors. This includes many species of birds, such as eagles, hawks, and falcons; mammals, such as whales, dolphins, and porpoises; reptiles, including snakes and lizards; and fish, which can