sharp
whistle of alarm and a lower chirping call while feeding in company.

_Tamias striatus lysteri._ Northeastern Chipmunk.--Formerly abundant in
the county, living in the forests. With the cutting of the forests it
has become scarce, but is now sometimes found along brushy roadsides as
well as in woods.

It occasionally climbs trees, but usually lives under stumps or logs in
or at the edge of woods. It stores up quantities of food, and is seldom
seen in the winter months.

We have an albino at the Museum of Zoology which was caught near Ann
Arbor by a cat, and I know of one other seen near the city.

The call of the chipmunk is a loud chirp or chuck, regularly repeated
and audible for a half-mile on still, frosty mornings. It also has a
bird-like chirp or rapid call.

_Sciurus hudsonicus loquax._ Southeastern Red-squirrel.--This is the
most abundant squirrel in the county. Owing to its small size it was
formerly not hunted; it also easily adapted itself to civilization and
increased so rapidly that in places it became a nuisance. It has been
accused of driving off the fox and gray squirrels, for which reason it
was exterminated from the University campus, where it formerly occurred.

The red-squirrel is very noisy and has a number of calls, chatters, and
a whining cough which easily distinguishes it from other squirrels.

Several albinos have been taken in Washtenaw County, one pure albino in
Dexter Township in 1908, and one nearly pure white, but with brownish
dorsal stripe and tail, near Ann Arbor in 1912.

_Sciurus carolinensis leucotis._ Northern Gray Squirrel.--Abundant in
the county for many years after its settlement. To the early settlers it
was an injurious species, as it destroyed much of their scanty corn
crop; but in later years it furnished much sport as well as a choice
food for the table. Its chosen habitat was the heavy forest of beech and
sugar maples, and with the cutting of these woods the gray squirrel has
gradually become rare, only a few now being found in the county. As
late as 1875 I saw many of the species, about one-half of the black
phase.

Its call is a high, shrill chatter, which may be heard quite a distance,
and which is distinguished by hunters from the call of the red squirrel
or fox squirrel. J. Austin Scott witnessed a migration in the fall of
1840, when hundreds of gray and black squirrels crossed the Raisin River
near Adrian. They came from the south and were so exhauste