Avian biology is the branch of biology that focuses on the study of birds, their behavior, physiology, ecology, evolution, and conservation. It encompasses a wide range of topics such as bird anatomy, reproduction, migration patterns, communication, and interactions with their environment. Researchers in avian biology may study specific species or groups of birds, and use a variety of techniques such as field observations, genetic analysis, and experimentation to understand the biology and behavior of birds. This field is critical for understanding and protecting avian species in the face of ongoing threats such as habitat loss, climate change, and disease.