Lawrence Kilham; Pair Formation, Mutual Tapping and Nest Hole Selection of Red-Bellied Woodpeckers, The Auk, Volume 75, Issue 3, 1 July 1958, Pages 318–329, htt
No takes yet. Share an insight, caveat, or question.
Lawrence Kilham (1958) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: