The Mammals of Washtenaw County, Michigan: Occasional Papers of the Museum of Zoology, No. 123

In Short

This scientific survey catalogs the transformation of Washtenaw County’s mammalian life from the early nineteenth century to 1922. By documenting the decline of large predators and the proliferation of species suited to human cultivation, the work provides a vivid, observational record of environmental change. It serves as both a formal biological register and a historical archive, preserving the memories of pioneers alongside museum specimens to capture a fleeting moment in the ecological history of the American Midwest.

The Story

The narrative begins with a landscape defined by three distinct geological features: the rugged moraines, the rolling clay belts, and the flat glacial lake plains. At the dawn of the nineteenth century, this was an "unbroken wilderness" where bears, wolves, and deer moved through dense forests of oak, hickory, and tamarack. The arrival of the first settlers—beginning with French traders in 1809 and permanent pioneers in 1823—initiated an irreversible transition. As the forests were cleared for agriculture, the natural habitats of the native fauna were dismantled, forcing a dramatic shift in the regional population.

The core of the account tracks the fate of these animals as they reacted to the encroaching frontier. Larger mammals, unable to coexist with human development, were systematically pushed out or exterminated. The black bear, the timber wolf, and the cougar vanished as human settlements grew, often aided by government-sanctioned bounties and the direct protection of livestock. Conversely, the settlers’ arrival inadvertently invited new, adaptable species into the region. The house mouse and the Norway rat followed the pioneers, while animals like the woodchuck and the skunk discovered that the newly created pastures and gardens offered an abundance of food and shelter, leading to their population explosion.

The author, who lived in the county for sixty-five years, acts as a bridge between these two eras. He draws upon his own observations from the 1860s and 1870s, as well as the oral histories of his father and other pioneers who witnessed the final days of the undisturbed ecosystem. As the record progresses, it shifts from the grand, overarching story of habitat loss to a granular species-by-species audit. Each entry provides a snapshot of survival: the raccoon’s mischievous adaptation to cornfields, the red fox’s clever persistence, and the tragic, final sightings of species like the Canada otter or the snowshoe hare.

The story does not conclude with a return to pristine nature, but rather with a sober, settled reality. By 1922, the county is firmly dominated by species that have successfully navigated the transition to human-altered landscapes. The original wilderness is preserved only in the remnants of beaver dams, the scattered bones of elk found in marshes, and the physical collections housed within the University of Michigan’s Museum of Zoology. The final pages offer a "hypothetical list" of sightings that could not be verified, acknowledging the limits of human record-keeping in the face of a rapidly changing world. The closing entries serve as a final testament to the quiet, often unobserved disappearance of the last vestiges of the pre-settlement era.

How It Unfolds

The geography of the wild The narrative establishes the physical stage by detailing the three physiographic districts of Washtenaw County. It describes the specific forest compositions—from oak-hickory stands to swampy ash and elm—that once dictated where each species could live.

The pioneer threshold The account transitions to the arrival of settlers in the 1820s and the immediate impact of clearing the land. It introduces the conflict between the settlers, who viewed wolves and bears as threats to their survival, and the native animals that were subsequently hunted to local extinction.

The rise of the colonizers The focus shifts to the animals that thrived under human influence. It details how the creation of meadows and grain fields provided new niches for species like the woodchuck and the cottontail, marking their transformation into common pests.

The catalog of survivors and ghosts The bulk of the text provides an exhaustive, alphabetical list of species, each accompanied by observations of behavior, population trends, and dates of the final recorded sightings. This section blends rigorous scientific data with anecdotes about catching a weasel in a coop or watching foxes play in a den.

The final assessment The work concludes with a distinction between confirmed species and those that remain speculative. By highlighting what remains uncertain, it underscores the difficulty of accurately tracking the exact moment when a species disappears from a developing landscape.

The People

Norman A. Wood is the central figure, serving as the observant chronicler of the county’s transformation. Driven by a sense of duty to preserve local history, he utilizes his own lifetime of experience to anchor the scientific data. He is not a dispassionate observer; he is a man who remembers watching his father trap opossums and who personally hunted woodchucks to protect his farm. His perspective is shaped by the practical, often harsh realities of pioneer life, yet he remains deeply curious about the natural world.

Jessup S. Wood, the author’s father, acts as the primary link to the pre-settlement past. His early experiences in Lodi Township provide the essential, lived evidence of how the first generations encountered—and often eradicated—the larger predators that defined the early landscape. Alongside the father and son, a cadre of local pioneers such as L. D. Watkins and Henry Wilson offer anecdotal evidence that fleshes out the cold statistics. These individuals are defined by their desire to establish a home, a process that inevitably stood in direct opposition to the survival of the wild animals they encountered. By the end, the pioneers and their descendant are left as the custodians of a story where the original inhabitants have been entirely replaced by the domestic and the opportunistic.

In Its Own Voice

"At the beginning of the nineteenth century Washtenaw County was an unbroken wilderness, and deer, wolves, bear, and other large and small fur-bearing animals were abundant."

This summary of the region’s original state underscores the dramatic scope of the transformation the author seeks to document.

"For sixty-five years I have lived almost constantly in Washtenaw County and I have seen the latter part of the exploitation of the forests of the county and the extermination of most of the larger mammals."

These words reflect the author’s unique position as both a witness to the environmental decline and the primary record-keeper of that loss.

What It's Really About

The book is a study in ecological transition and the cost of human progress. At its core, it asks how a landscape responds to the sudden imposition of civilization. It explores the tension between the "pioneer" mindset—which viewed the wilderness as a dangerous obstacle to be cleared—and the scientific desire to document the resulting loss of biodiversity. The text implicitly questions what is sacrificed when an environment is repurposed for agricultural and residential use. It is a meditation on the permanence of change, illustrating that while some species exhibit remarkable resilience, others are fundamentally incompatible with the human-dominated world. The book serves as a silent plea for the value of local, historical, and biological record-keeping in tracking the quiet, steady erosion of a once-diverse environment.

Why Read It Today

Readers with an interest in natural history, local Michigan studies, or the mechanics of environmental change will find this work deeply compelling. It reads with the precision of a field journal and the emotional weight of a memoir. The language is clear and unadorned, reflecting the author’s background as a museum curator rather than a novelist.

However, modern readers should be prepared for the attitudes of the early twentieth century. The author speaks candidly about the killing of animals—whether for sport, pest control, or scientific collection—without the conservationist lens common in contemporary writing. His casual accounts of trapping and the bounty systems of the nineteenth century may be difficult for some to process, as they reflect a time when the wilderness was viewed as an inexhaustible resource to be conquered.

Despite these period-specific attitudes, the book offers a rare, ground-level view of a changing world. It is the sort of volume that stays with you, forcing you to look at a local patch of woods or a suburban backyard and wonder what once lived there. It provides a sobering look at how quickly a landscape can be fundamentally altered, reminding us that the current state of our environment is merely one chapter in a much longer, often invisible history of human influence and biological loss.