contributing authors:
- The Spark: Charlton Ogburn, Jr.; John Burroughs; John Kieran; Julian Huxley;Elliott Coues; Peter Scott; Sigurd Olson.
- The Lure of the List: Alan Devoe; Page Jaques; John O'Reilly; Richard M. Saunders; Maurice Brooks; Bruce Campbell
- Migration: Donald Cuross Peattie; Raymond S. Deck; William Beebe; Edwin Way Teale; Albert Hochbaum; Maurice Broun; W.H. Hudson; Herbert Brandt; The Melbourne Argus; Jacques Delamain; Roger Tory Peterson; H. Gaetke
- Glamour Birds: John James Audubon; Alexander Wilson; Paul Bartsch; Henry Beetle Hough; Carl Koford; William Bartram; Robert Porter Allen; Frank M. Chapman; Etienne Gallet; Helen Cruickshank; Herbert Brandt; Henry D. Thoreau; Louis J. Halle; Edward Wilson; Roger Tory Peterson; Alfred Russel Wallace; Dillon Ripley; Alexander Hugh Chisholm
- Birds in Far Places: Henry Beston; Henry W. Elliott; R.M. Lockley; James Fisher; Arnold W. Boyd; Abel Chapman and Walter J. Buck; Colonel R. Meinertzhagen; Madeline Alston; Julian Huxley; J.J. Ter Pelkwijk; Charles Darwin; Robert Cushman Murphy; George Miksch Sutton; Leslie Brown; Louis Agassiz Fuertes; Henry Walter Bates
- There Is Often Adventure: Apsley Cherry-Garrard; Harrison Matthews; Edward Howe Forbush; John James Audubon; Donald R. Griffin; Paul Zahl; Robert Porter Allen; George Miksch Sutton; Harold Penrose; William Beebe; James P. Chapin; Arthur A. Allen; William Brewster
- The Full-Fledged Watcher: Gilbert White; Richard Jeffries; John James Audubon; Aldo Leopold; Ernest Thompson Seton; Julian Huxley; Loye Miller; Joseph Grinnell; Lewis Wayne Walker; David Lack; Alexander Skutch; Konrad Lorenz; William Vogt