The cover of Goldenbird #1 is inspired by this cover illustration for Judge magazine by Robert Patterson (1898-1981). I found this short info about the artist online:
After studying at art at the Chicago Art Institute and in Paris, Robert Patterson began his career as a cartoonist for Judge and Life, and on the staff of French Vogue. He has done illustrations for some dozen magazines, for advertising and other media and for numerous books, and is a portrait painter as well. He edited, as well as illustrated, ON OUR WAY, a book for teenagers. With his wife and son and daughter, Mr. Patterson lives in Easton, Connecticut.The illustrator is berhaps most famous for his work on the 1950's epic children's book, You Will Go To The Moon. At least, I think it's the same Rob Patterson.