Who carved his own fingerprint and was also an ornithologist?

The correct answer is Thomas Bewick. He was not only a renowned ornithologist known for his detailed illustrations and studies of birds but also famously carved his own fingerprint into wood, which he used to create prints. This artistic endeavor was significant, showcasing his interest in both natural history and the uniqueness of fingerprints. Bewick's work laid the groundwork for illustrating wildlife and contributed to the understanding of various species, making him a prominent figure in both ornithology and the early recognition of fingerprints as unique identifiers.

The other individuals mentioned have also made important contributions but do not align with the specific criteria of both carving fingerprints and being an ornithologist. J.C.A. Mayer, Henry Faulds, and Sir William James Herschel made significant advancements in fingerprinting but did not prominently identify as ornithologists or are not known for carving their own fingerprints in the same artistic context as Bewick.