Bryan Nelson was an English ornithologist, environmental activist and academic. He was a prominent authority on seabirds, publishing numerous books and articles on gannets, cormorants and other species, teaching zoology at the University of Aberdeen, and conducting pioneering ornithological research in Jordan, Christmas Island and the Galápagos Islands. In his lifetime, Nelson was "acclaimed as the world's leading expert on the Northern Gannet". He also contributed to the creation of Christmas Island National Park, which helped to preserve the habitat of the endangered Abbott's Booby.
At the University of Aberdeen, he offered tutorials on scientific writing and the use of English.