"Dr. Konrad Lorenz has made a number of alterations and additions to the translation."
"Reprinted from the Avicultural Magazine [v. 57-59]."--Cover.
Includes bibliographical references (page 85).
Translation of the author's Vergleichende Bewegungsstudien an Anatinen (Festschrift Oskar Heinroth), published in Journal für Ornithologie, Ergänzungsband 3 (1941), p. [194]-293.