Walter E. Bohl (1907-1990). Born in Chicago but spent most of his life as a freelance artist in Scottsdale, Arizona. His image of Wood Ducks appeared on the 1943 duck stamp.
'Federal Duck Stamp Story, Fifty Years of Excellence, 1934-1984' by Laurence Jonson, 365p. published in 1984
Mary T. Sheahan, National Postal Museum