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Dynamics of the Cavities of Grey-Headed Woodpeckers Picus canus Reveal Their Long- and Short-Term Ecological Roles in Boreal Forests
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![Dynamics of the Cavities of Grey-Headed Woodpeckers Picus canus Reveal Their Long- and Short-Term Ecological Roles in Boreal Forests Dynamics of the Cavities of Grey-Headed Woodpeckers Picus canus Reveal Their Long- and Short-Term Ecological Roles in Boreal Forests](https://bioone.org/ContentImages/Journals/aorn/56/2/00016454AO2021.56.2.006/graphic/WebImages/img-z4-8_199.jpg)
Dynamics of the Cavities of Grey-Headed Woodpeckers Picus canus Reveal Their Long- and Short-Term Ecological Roles in Boreal Forests
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