People who are ornithologists practice ornithology, the study of birds. They may also be birders. Ornithology is a branch of natural history, zoology, and biology. See also the list of ornithologists.
This category has the following 5 subcategories, out of 5 total.
The following 7 pages are in this category, out of 7 total. This list may not reflect recent changes (learn more).