Peter Marler, Marcia Kreith, Miwako Tamura; Song Development in Hand-Raised Oregon Juncos, The Auk, Volume 79, Issue 1, 1 January 1962, Pages 12–30, https:
No takes yet. Share an insight, caveat, or question.
Marler et al. (1962) studied this question.
Synapse has enriched 3 closely related papers on similar clinical questions. Consider them for comparative context: