An ornithologist's study is the scientific study of birds. It involves observing, recording, and analyzing the behavior, ecology, and physiology of birds. Ornithologists may also study the evolution, taxonomy, and conservation of birds. They often use a variety of tools to collect data, such as binoculars, cameras, and sound recording devices. Ornithology is an important field of study, as it helps us to understand the impact of human activities on bird populations and habitats.