John Seney, an engineer at the Du Pont laboratory in Seaford, Delaware, had an ambitious plan (which he called 'Project Daedalus') to study buzzards and thereby figure out a way to allow a man to fly by flapping his arms — with the help of 36-foot wings strapped to them.
Seney's project received quite a bit of media attention for several years in the mid-1960s, but I can't find any report indicating that he ever got to the stage of a test flight.
"Leonardo, the buzzard, is chased in Seaford, Del., basement laboratory of John Seney, 50-year-old scientist who is using the buzzard in his human flight experiments. Pursuing the bird is Stephen Moore who is helping Seney, and if the experiments get off the ground, will see Moore get off the ground with human-propelled wings. That's why they have named the buzzard Leonardo — after Leonardo da Vinci who had dreamed of flying like a bird."
Sarasota Journal - Dec 30, 1964
Baltimore Sun - Feb 21, 1965
Category: Flight | Experiments | 1960s