William Ryan Dawson (24 August 1927 – 8 March 2020) was an American zoologist and ornithologist and emeritus professor of zoology at the University of Michigan. He is known in the field of ornithology for his comparative studies on desert and closely related non-desert birds in the south-western United States, Mexico and Australia.
Thomas Joseph Cade (January 10, 1928 – February 6, 2019) was an American ornithologist most notable for his efforts to conserve the peregrine falcon.
William Harroun Behle (May 13, 1909 – February 26, 2009) was an American ornithologist from Utah. He published around 140 papers on the biogeography and taxonomy of birds, focusing largely on birds of the Great Basin. Behle was born in Salt Lake City, the second of three children of parents Augustus Calvin Behle, a surgeon, and Daisy May Behle. He studied at the University of Utah, earning a B.A. in 1932 and M.A. in 1933, then pursued doctoral work at the University of California, Berkeley, under Joseph Grinnell, earning a PhD in 1937. Aside from four summers as a naturalist at Grand Canyon National Park, Behle spent the majority of his career as a professor at the University of Utah, where he worked from 1937 until his retirement in 1977, and continued to perform research as professor and curator emeritus. Behle was a fellow of the American Ornithologists' Union and American Association for the Advancement of Science, president (1972–1974) of the Cooper Ornithological Society, and member of the Wilson Ornithological Society. He is commemorated in the scientific name of a tarantula species, Aphonopelma behlei (now considered a synonym of A. marxi) named by his colleague Ralph V. Chamberlin in 1940.Behle's contributions to ornithology include some 140 papers on bird distribution and taxonomy, and the description of several subspecies (geographic races), including the western purple martin (subspecies Progne subis arboricola) and a race of slate-colored fox sparrow. Behle's 1990 book Utah Birds: Historical Perspectives and Bibliography focused the history of ornithology in Utah from 1776 to modern times, with biographical accounts of collectors and researchers, amateur and professional alike. UC Berkeley professor Ned K. Johnson called it "the most detailed ornithological history of any extensive region of North America."In 1934, Behle married Dorothy Davis, who died in 2001. William Behle died on February 26, 2009, at the age of 99, survived by two sons.
Jean Théodore Delacour (26 September 1890 – 5 November 1985) was a French ornithologist and aviculturist. He later became American. He was renowned for not only discovering but also rearing some of the rarest birds in the world. He established very successful aviaries twice in his life, stocked with birds from around the world, including those that he obtained on expeditions to Southeast Asia, Africa and South America. His first aviary in Villers-Bretonneux was destroyed in World War One. The second one that he established at Clères was destroyed in World War Two. He moved to the United States of America where he worked on avian systematics and was one of the founders of the International Committee for Bird Protection (later BirdLife International). One of the birds he discovered was the imperial pheasant, later identified as a hybrid between the Vietnamese pheasant and the silver pheasant.