Notes on the Distribution of the Grey Squirrel (Sciurus carolinensis) and the Red Squirrel (Sciurus vulgaris leucourus) in England and Wales from 1945 to 1952

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Abstract
The distr. of squirrels was surveyed in 23 counties and the West Riding of Yorkshire. New records of presence of the grey squirrel show it to have spread into further 199 squares in the 10 km. national grid. The red squirrel was not reported from 241 squares in which it was said to occur in 1944-45. In 8 counties red squirrels would seem to have disappeared from areas where grey squirrels have been established since 1945.