Guy Tudor, a self‑taught ornithologist, wildlife illustrator and MacArthur fellow whose field guides trained generations of naturalists and citizen scientists to distinguish species such as the Rufous‑breasted Leaftosser from the Lesser Hornero, died on July 14 in Greenport, N.Y. He was 91.
The death occurred at Stony Brook Eastern Long Island Hospital, near his home, caused by pneumonia, according to friend Claudette F. Welch.
When digital bird databases like eBird were still future, Mr. Tudor began documenting the avian world in watercolors and gouaches celebrated for their delicacy, precision and his uncanny ability to capture the subtle characteristics of each bird.
“Guy liked birds, like the Spadebill, with a lot of character,” said Sophie Webb, a biologist, wildlife illustrator and author.
Although classified as a tyrant flycatcher, the tiny Spadebill is especially shy and often goes unnoticed except for its distinctive, assertive trill that reverberates with short‑king energy.
His talent for capturing unique behavior, motion and exact plumage earned him a MacArthur fellowship in 1990, noted Terence Clarke, an artist and naturalist who was a friend.
The Spadebill’s range stretches from southeastern Mexico through Central and South America—mirroring Mr. Tudor’s own peripatetic life.
For decades he studied the oscines, or songbirds, of the neotropics across the Southern Hemisphere—sketching, keeping detailed field notes and amassing a vast image archive that he used as reference for definitive field guides such as “A Guide to the Birds of Columbia” (1986), “A Guide to the Birds of Venezuela” (1978) and “Field Guide to the Songbirds of South America” (2009), all landmarks in the discipline.
Known as a mentor to both avocational birders and professional ornithologists, Mr. Tudor helped launch the careers of many young scientists, researchers and artists, though he was often described as a curmudgeon.
His primary base was a modest four‑room apartment in Forest Hills, Queens, where he collaborated with ornithologist Robert S. Ridgely on the multi‑volume masterpiece “The Birds of South America” (1989 and 1994), covering nearly 1,700 species across the Neotropics.
Bent over a drawing board, cigarette ever present, Mr. Tudor rendered tropical birds—from spadebills to keel‑billed toucans, scarlet macaws, turquoise‑browed motmots, paradise tanagers and long‑wattled umbrellabirds—with pen and brush.
Guy Adwill Tudor III was born on September 28, 1934, in New York City to Charles Tudor, a journalist and art director who worked with photographers such as Walker Evans and Dorothea Lange, and Margaret (Matthews) Tudor.
His father later became a founding art director of Life magazine, designing its iconic logo.
Recalling the family’s artistic heritage, Matthew Tudor, his brother, said, “My father and grandmother were both illustrators… he started with birds and butterflies—anything with wings.”
Guy grew up in Manhattan’s Yorkville neighborhood, attended Governor Dummer Academy, Princeton and Yale, and served in the Army.
He married twice, to Elizabeth Linko and Michele Le Marchant, both of whom predeceased him, as did his son Michael Seton Tudor from his first marriage. His brother is his only surviving immediate family member.
A restless traveler, he logged sightings in about 50 countries; his brother recalled an episode in Caracas where Tudor arrived with a telescope attached to a rifle butt, attracting the attention of Venezuelan soldiers.
Beyond birds, he championed butterflies, co‑founding the New York City Butterfly Club in 1984, serving as its president, and later helping establish the North American Butterfly Association, whose annual surveys have documented species declines.
“Guy was a deeply passionate conservationist,” said John A. Gwynne Jr., a bird illustrator and co‑founder of the Sakonnet Garden, who collaborated with Tudor on guides for Venezuela and Brazil. “He used to say, ‘The infidels have invaded my church, and they’ve almost reached the altar.’”
