Numbers of tents of western tent caterpillars over time for six areas in British Columbia Canada and population characteristics for the population on Galiano Island

<b>Abstract</b><br/><p>This paper is a historical account of the experiments and observations on the population dynamics of western tent caterpillars, <em>Malacosoma californicum pluviale,</em> beginning in the 1975 through 2025. It contains figures of population trends and characteristics of the populations that vary with population density to show that infection by Mcplnucleopolyhedrovirus (extrinsic factor) and changes in fecundity and early larval survival (tent size) (intrinsic factors) relate to the population change. </p>