Squirrels may harvest a far greater proportion of ponderosa pine cones than many foresters realize. This was evident while making a routine cone count on a number of permanent plots on the Stanislaus Experimental Forest near Pinecrest, California, in September 1952. Ponderosa and J effrey pines were the predominant spreiPs affected. Many ponderosa pines had more than half their total number of cones cut and destroyed. Notes