Ornithologist (noun)

A specialist in the scientific study of birds, including their behavior, physiology, distribution, and classification.

Origin:

Derived from the greek words 'ornithos', meaning 'bird', and 'logia', meaning 'the study of'.

Examples:

1. The ornithologist spent years observing the migratory patterns of birds, tracking their movements and studying their habitats.
2. The ornithologist's expertise in avian behavior and physiology was widely recognized, and he was often called upon as a consultant.
3. The ornithologist's research was critical to our understanding of the interactions between birds and their environment.
4. The ornithologist's work helped to shed light on the factors that drive the decline of bird populations, and to develop conservation strategies.
5. Ornithologists use a variety of tools and techniques, including observations, experiments, and data analysis, to study the natural world.