An editorial in one of the well-known magazines devoted to ornithology, several years ago, which suggested that it would probably be necessary to devise expensive machinery to bore out cavities in natural wood in imitation of those made by woodpeckers themselves, in order to attract these birds, first led me to attempt to supply their requirements. As far as I could learn woodpeckers had never been known to occupy such boxes in America up to that time. I did not learn of the successful boxes in Germany until after my own had been occupied and believed that I was working in an unexplored field.
Proceedings of the Iowa Academy of Science
©1913 Iowa Academy of Science, Inc.
Pellett, Frank C.
"Nest Boxes for Woodpeckers,"
Proceedings of the Iowa Academy of Science, 20(1), 305-306.
Available at: https://scholarworks.uni.edu/pias/vol20/iss1/36