Keith E. Vinicombe is a British ornithologist and writer on bird identification.
Vinicombe is best known for his first book, the Macmillan Field Guide to Bird Identification. Subsequent publications include Rare Birds in Britain and Ireland - a photographic record, co-authored with David Cottridge, in which Keith set out to explain theories about bird vagrancy in Britain and western Europe, including reverse migration. He is identification consultant to Birdwatch magazine, and has written extensively on bird identification in Birdwatch, and other British journals, including Birding World and British Birds.
He has served on both the British Birds Rarities Committee and the British Ornithologists' Union Records Committee. His regular birding patch is Chew Valley Lake, where he has found numerous rare birds. Elsewhere in Avon, he is responsible for finding nine county firsts. Elsewhere in Britain, his finds include Britain's second ring-billed gull and the first lesser scaup and Blyth's reed warbler for the Isles of Scilly. He was also among the observers who confirmed the identification of Britain's only lesser short-toed lark, at Portland Bill in 1992.