European authors have reported the absence of helminth parasites in marmots examined after hibernation. It seemed strange to the author that none of the helminths of the marmot had adapted to survive host hibernation. In late April and early May 13 woodchucks (Marmota monax) were shot and examined for intestinal helminths. Seven of the 13 were infected with one or more species of nematode. In the area of central Vermont where these animals were collected woodchucks usually stay underground for at least 5 months. Since it is doubtful that they had been above ground for more than a week and since the chance of reinfection after the cessation of hibernation is very slight it is suggested the parasites found were successful in overwintering.