James Maurice Harrison (13 February 1892 – 4 December 1971) was a British physician and amateur ornithologist.
He studied the birds of the Kent region where he lived and took an interest in plumage aberrations and topics with close links to medicine.
He was the sole officer to survive the sinking of Monitor 28 and received a Distinguished Service Cross for saving a marine.
He also collected specimens and used his taxidermist skills to mount them in a home museum which later became the Harrison Institute.
Harrison's books include: He also contributed to The Ornithologists' Guide (1956) and A New Dictionary of Birds (1964).