Different types of bees have different ways of surviving the winter. Honeybees, for example, do not die off completely in the winter. Instead, they form a cluster to keep warm and generate heat with their muscles by shivering and expending energy. They keep the inside temperature of their winter cluster at about 95 degrees. On the other hand, solitary bees, such as Tawny mining bees, Ashy mining bees, and Red mason bees, die off before winter comes. The hard-working females have left their eggs sealed inside a nest in a cavity or burrow, provided with food stores of pollen and nectar. Solitary bees which emerge in the spring, such as Mason bees, grow from egg to adult over the summer. During the winter, the new adults sit tight in their cocoons in a sleepy state of torpor. In this way, they are primed and ready to break out when the temperature rises, so they can take advantage of spring blossoms such as willow, blackthorn, hawthorn, and orchard trees. In general, most summer insects are gone by late October in the US, and some bees will die every day throughout the cool months. Therefore, the answer to the question "what month do bees die off" depends on the type of bee and the location.