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In the past, it has been necessary to cut down woodpecker nesting trees in order to investigate the decay characteristics or the fungi species causing damage (e.g. Kilham 1971, Conner et at 1976). The holes excavated by woodpeckers are, however, important resources both for the excavators themselves and for secondary cavity users that exploit the holes as nesting or roosting sites (Thomas et at 1979). A method that enables the researcher to observe the characteristics of a woodpecker nest tree, without cutting it down, has long been required. The aim of this study was to develop a practical and inexpensive method to measure the hardness of wood in standing trees, in the field.

A Method to Measure the Hardness of Wood in Standing Woodpecker Nesting Tress.