The relationship between silver birch (Betula pendula) bark structure and evidence of use by the Welsh Clearwing moth (Synanthedon scoliaformis)

The status of Synanthedon scoliaformis was investigated at Cannock Chase Country Park. A 1km2 study area in Old Acre Valley, thought previously to be a key area for the moth, was selected for observation.
Tree surveys conducted prior to the adult moth’s flight period, identified 31 Betula trees with signs of emergence. Correlation analysis suggests there is a moderate to strong positive correlation between increasing bark fissure depth and number of emergence holes(r= 0.4413). It is thought that the significance of fissure depth has not been identified previously.