William Homan Thorpe FRS (1 April 1902 – 7 April 1986) was Professor of Animal Ethology at the University of Cambridge, and a significant British zoologist, ethologist and ornithologist. Together with Nikolaas Tinbergen, Patrick Bateson and Robert Hinde, Thorpe contributed to the growth and acceptance of behavioural biology in Great Britain. Career Thorpe grew up at Hastings and Weston-super-Mare. His father Francis Homan was a borough accountant who also worked with the London Missionary Society while his mother took part in the women's suffrage movement and was involved in Christian pacifism. He was taken care of by a nurse Ellen Clara Birt while his parents travelled in the United States. He studied for a while at Clarence School, Weston-super-Mare and was sent at fourteen to Mill Hill School, after which he entered Jesus College, Cambridge, in 1921 to obtain a degree in Agriculture. He had been influenced by a talk by Maxwell Lefroy that there was a growing need for entomologists. In 1925 he began to work in the Department of Agriculture on insect pests. He continued on this line during two years at the University of California as a Rockefeller Fellow. Awarded the PhD from Cambridge in 1929, he then moved to the Imperial Institute of Entomology, returning to Cambridge three years later as a lecturer in Entomology and Fellow of Jesus College. A religious conscientious objector, during World War II he studied insects that preyed on stored food. In 1943 he published an extensive review on insect learning, following it with a similar work on birds in 1951. He closely followed the burgeoning ethological research of Konrad Lorenz and Niko Tinbergen, introducing their work to English readers. In 1951-52 he was the Prather Lecturer at Harvard University, and in 1956 published his book Learning and Instinct in Animals. In 1950 he became the first director of the Cambridge Ornithological Field Station; he was appointed Reader in Zoology in 1959 and awarded a personal chair in 1966. Bird song When the sound spectrograph was launched he saw that recording sound frequencies and intensities over time made it possible to quantitatively analyze bird song. He obtained the first of these devices in the UK, fathering a group of talented investigators of song. He also led a rigorously controlled study of imprinting learning. Other He was a member of the advisory committee to the Anti-Concorde Project and as a vocal conservationist