Origin of ornithology
Examples from the Web for ornithological
David Sibley became my ornithological guru, and I did follow him into the field.
His Journals are full of other observations, ethnographical, ornithological, and entomological.
I had not many opportunities of figuring the birds from life, so very desirable in ornithological subjects.
With the limited means at its command the work of ornithological exploration was carried forward.The Bird Study Book|Thomas Gilbert Pearson