Lee R. Dice

“ In the grove yellow birch, some of large size, are common; toward the bottom of the slope hemlocks are also common; and near the edge of the bog there are a few arbor-vitae. Shrubs are almost absent, there being merely a few small seedlings of arbor-vitae, hemlock, and fir, mostly toward the bottom of the slope. A few scattered clumps of grass appear, but the forest floor is mostly covered only by a thick carpet of dry pine needles. Numerous dead limbs and sticks have fallen from the pines.
Wet hardwood forest habitat: The land adjoining much of Gogebic Lake is low and poorly drained. ”

“ The growth in these sapling forests is very thick, and the ground is nearly bare of vegetation, though it is heavily covered with dead sticks and small logs. In a thick growth of quaking aspens, on wet ground studied near Gogebic Lake, a number of alders and paper birches, a few young trees of sugar maple and arbor-vitae, and a rare elm occur. A scanty undergrowth of mountain maple and numerous sugar maple seedlings is present. Few mammals are found in this stage of the forest. ”

“ Tall-sedge habitat: In the beaver meadow studied near Gogebic Lake, an area about 200 meters by 100 meters or more is occupied by a heavy growth of high, coarse sedges, reaching a height of about .75 to 1.00 meter. A few grasses and some low herbs occur sparingly among the sedges. The habitat had not been burned over and the ground is covered with a thick mat of the decaying leaves and stems of the sedges and grasses. In most places the ground is quite wet, sometimes soggy to walk upon, and in a few places low hummocks are numerous. ”

“ Hemlocks are rare, and only one elm was seen. The trees are large, the trunks frequently reaching diameters of two feet or more. The forest crown is high and heavy. Underbrush is scanty and low, being mostly young seedlings of sugar maple, though seedlings of linden are numerous. Other shrubs and herbs noted were the leatherwood (Dirca palustris) , hazel (Corylus rostrata) , yew (Taxus canadensis) , gooseberry, ferns, false Solomon's seal, and grass. On the ground are many decaying leaves, these usually forming a heavy carpet; decaying logs and freshly fallen sticks are common. ”

“ The habitat is very narrow and is closely encroached upon by shrubs and trees, such as sumac, cherry, white pine, jack pine, oaks, aspens, and paper birch. Signs of fox were noted at the edge of the cliff, but no trapping was carried on here.
Air
Aerial habitat: The only aerial mammals are the bats, of which four species were taken during the summer. The flying squirrel is not considered to be a true aerial form.
Burns and Clearings
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. ”

“ A half-grown juvenile was seen to swim the Ontonagon River near its entrance to Cisco Lake. This was on July 10, near noon, with bright sunshine. The river here is at least 75 yards in width, but has no perceptible current.
Juveniles taken in traps were observed to extrude scent glands from the anus when approached. ”

“ It is most abundant in grassy and sedgy meadows and in open bogs, though it is found rarely in swamps and tree-covered bogs. The individual listed from the arbor-vitae swamp was taken in a young growth of arbor-vitae, black spruce, hemlock, and many alders, and not in typical arbor-vitae swamp habitat. ”

“ Of 13 females examined from June to August, two contained 4 embryos each, two 5 embryos each, and two 6 embryos each. August 14, at Little Girl's Point, was the last date on which embryos were found.
The species is somewhat diurnal. Several times one was seen in daylight about the camp in the Cisco Lake Region, and several were trapped during daylight hours. ”

“ A juvenile weighing only 914 grams was taken as late as July 21 at Fish-hawk Lake, but no embryos were found in the period between June 29 and September 3. It is often active throughout the day as well as in the night. ”