Fires have been numerous throughout northern Michigan and a large part of the region is covered by various stages in the succession following fires or clearings. The areas studied were selected as representative of the natural conditions of the peninsula, but even in these districts there are many burned areas. Many large areas have been heavily logged over, sometimes followed by fire, with a result similar to that of a fire. In the region studied there are numerous small clearings, some of which are in use as the residences of settlers, but most have been allowed to revert to a wild condition. The stages in succession on an abandoned clearing seem to be similar to those following a fire, and they are here considered together. _Herbaceous stage:_ After a fire in a forest in this region the first vegetation to spring up seems to be the herbs, of which the fireweed (_Chamaenerion angustifolium_) is most prominent. A number of areas dominated by this type of vegetation were seen, but the type seems to be short-lived, and is probably quickly replaced by shrubs and tree seedlings. The stages in succession following a fire in swampy areas may be somewhat different from that in a hardwood region, but no data was obtained. No opportunity presented itself to study the mammals of the herbaceous stage, and I have no records for the species found there. _Shrub stage:_ Following a fire or clearing in a hardwood area the herbaceous stage is apparently quickly followed by a thick growth of shrubs and young trees. The characters of the shrub growth vary considerably with the texture of the soil, amount of soil moisture, slope, and completeness of burning. The growth is usually quite thick, though in some clearings where the growth has been kept down for some time there may be open grassy patches. In small clearings near Fish-hawk Lake the raspberry (_Rubus strigosus_) is a characteristic species, but near Little Girl's Point it is much less common. A large area of shrub studied near Little Girl's Point is on a rather steep slope facing to the north, though part is at the bottom of the hill on a very gentle slope. There are no large trees, but saplings up to 2-1/2-inch trunks occur; most, however, are smaller. The quaking and large-toothed aspens (_Populus tremuloides_ and _P. grandidentata_), paper and yellow birches (_Betula papyrifera_ and _B. lutea_), sugar maple, and linden are common seedlings. Shrubs, such as the sumac (_Rhus hirta_), wild cherry (_Prunus pennsylvanica_), raspberry, willows (Salix spp.), mountain maple, red-berried elder (_Sambucus racemosa_), and hazel are common. A few herbs, like the fireweed, golden-rod, and pearly everlasting, occur in open places. A number of mammals are found in the shrub stage, but they are far less abundant than in mature hardwood forest.