A catechism is 1. a manual for instructing systematically; spe cif: a summary of religious doctrine often in the form of questions and answers. 2. a set of formal questions put as a test. What is a ...

Learn about the study of birds known as ornithology. Explore the history of avian science, its importance in ecology, and the work of famous ornithologists. The scientific study of birds is called ...

Ahead of the biggest day in birding, we take an inside look at the Cornell Lab of Ornithology, home to millions of audio ...

Nineteenth-century ornithologists, like journalists, specialized in the — who, what, where, when — of observing birds. Many birds of this era were collected in the field, stuffed and studied, leading ...