MASON DURING the past few years the writer, with the help of friends, has carried out a series of experiments with Corn-Crakes {Crex crex) The experiments consist in calling up Corn-Crakes to a stuffed dummy by imitating the " crake-crake " song with a pair of bones. The bones are about seven inches long and one has notches filed in one edge. When the plain bone is rubbed hard across the notches a ...

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