IN February, 1942, seventy-five nesting boxes were put up inone of the oak woods of the Forest of Dean, with the object of encouraging the breeding of insectivorous birds (tits, in particular) and thus alleviating, if possible, the recurrent outbreaks of oak Tortrix and winter moths, which cause rnore or less considerable defoliation nearly every year. In May and June, it was confirmed that twent...

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