An Annotated Checklist of Nebraskan Bats

In Short

Olin L. Webb and J. Knox Jones, Jr. present a comprehensive inventory of the bats inhabiting Nebraska, synthesizing historical records, museum collections, and field surveys conducted across the state. The text documents ten previously recognized species while introducing new discoveries, detailing specific geographical distributions, physical abnormalities, and seasonal roosting habits. It has lasted as a foundational reference for mammalogists and regional natural historians, offering a rigorous baseline of biodiversity data gathered through meticulous specimen collection and archival research during the mid-twentieth century.

The Story

The inquiry begins with a historical survey of early naturalists who first documented flying mammals in the Nebraska Territory, noting how early nineteenth-century explorers like J. G. Cooper initiated records that later researchers like Myron H. Swenk expanded. The authors examine these foundational accounts, carefully separating substantiated findings from lost specimens or unverified reports, before pivoting to their own extensive field investigations conducted over a six-year period. Central to this physical survey are two man-made limestone quarries near Louisville, which serve as artificial caves providing crucial hibernation sites for several species in a landscape otherwise devoid of natural caverns, complete with stable summer and winter temperature recordings.

With the historical framework and subterranean setting established, the narrative transitions into a systematic taxonomic progression through the various genera and species identified within the state. Each account details specific distributions, collection localities, and behavioral observations gathered from specimens housed in major regional and national museums or secured during recent field trips. For instance, the long-eared myotis is traced to the pine ridge area, while the eastern long-eared myotis and eastern pipistrelle are carefully documented within the dark, pillar-supported limestone tunnels of Cass and Sarpy counties. Unusual findings—such as a brown myotis specimen exhibiting a rare dental abnormality lacking upper premolars—are recorded with precise anatomical detail and cross-referenced with comparative literature.

Moving westward across the state, the progression follows researchers into the badlands and river valleys where distinct subspecies adapt to local environments. The small-footed myotis and the pale big brown bat reveal patterns of roosting in hay barns and beneath loose pine bark, occasionally sharing microhabitats or enduring high temperatures in abandoned loft spaces. Accounts of migratory species like the silver-haired bat, red bat, and hoary bat illustrate seasonal shifts across the plains, while rare vagrants, such as a Mexican free-tailed bat found in a downtown Lincoln business building, highlight unexpected geographic occurrences and reproductive milestones.

The argument culminates in an outlook toward unconfirmed species that may yet be discovered within regional boundaries, mapping out potential ranges for six additional bats that researchers should anticipate finding in the southeastern or northwestern corners of the state. By grounding every assertion in physical evidence, museum loans, and verifiable collection data, the work resolves into a definitive snapshot of regional chiropteran fauna. It closes by cementing a rigorous methodological standard for future biological surveys, leaving a legacy of empirical thoroughness for regional natural history.

How It Unfolds

Historical foundations The text opens by reviewing a century of prior records, evaluating early nineteenth-century collections and subsequent state mammal lists compiled by earlier researchers. The authors carefully scrutinize missing specimens and unverified literature reports to establish an accurate, critical baseline of prior knowledge before presenting new findings.

Subterranean fieldwork The investigation turns to two abandoned man-made limestone quarries along the Platte River Valley that compensate for the state's complete lack of natural caves. Researchers detail the structural layout, temperature stability, and extensive use of these artificial tunnels by multiple species of hibernating bats.

Taxonomic accounts The core of the work systematically details each species and subspecies known to inhabit the region, incorporating fresh state records and physical museum specimens. Every entry outlines specific morphological traits, documented collection sites across various counties, and notable anatomical variations like dental abnormalities.

Geographic distribution The narrative maps out how different populations cluster within distinct ecological zones, ranging from the pine ridge canyons of the northwest to river woodlands in the east. Field observations describe colony behaviors, alternative roosting sites in rustic barns, and seasonal migration habits across the open plains.

Future possibilities The book concludes by identifying six additional bat species that lack definitive local confirmation at the time of publication but likely occur within state borders. This forward-looking summary provides explicit geographical guidance for where future field naturalists should direct their search efforts.

The People

Olin L. Webb and J. Knox Jones, Jr. drive the modern investigation, wanting to resolve discrepancies in past literature and establish a definitive, specimen-backed checklist of Nebraskan bats. Standing in their way are missing historical specimens, unverified past reports, and the natural elusiveness of nocturnal mammals scattered across a vast landscape devoid of natural caves. Through persistent field collections and collaboration with regional museums, they succeed in adding multiple new species to the state list and verifying previously doubtful records.

Historical figures form an essential supporting cast whose past efforts frame the authors' mission. Harrison Allen and J. G. Cooper initiated the earliest nineteenth-century mentions of regional bats, though their early specimens were lost or dispersed without clear locality data. Later, Myron H. Swenk advanced the field by publishing comprehensive accounts of Nebraskan mammals, cataloging multiple species while occasionally relying on unproven reports that lacked physical vouchers.

Other contributors, such as W. B. Quay, documented large maternity colonies in badland crevices, while institutional curators like Henry W. Setzer and E. Raymond Hall provided critical museum data and manuscript assistance. Each individual—whether historical collector or contemporary researcher—moves the scientific community closer to accuracy, transforming scattered anecdotes into a structured, verifiable catalog of natural history.

In Its Own Voice

Describing the unique subterranean environment utilized by hibernating populations, the authors detail the layout of local excavations:

The quarries, one on either side of the Platte River Valley, are in a horizontal stratum of limestone 40 feet in thickness, and are of the room and pillar type; that is to say, the stone has been quarried away leaving rooms having supporting pillars approximately every 50 feet.

Summarizing the expected geographic distribution and migratory status of the silver-haired bat across the plains, the text notes:

Entire state, fairly common during migrations but probably not breeding within our limits

What It's Really About

Beneath its detailed taxonomic cataloging, the book addresses fundamental questions of biological distribution, environmental adaptation, and the critical importance of rigorous museum documentation. It explores how woodland and prairie mammals adapt to ecosystems lacking natural geological shelters, successfully utilizing man-made structures like commercial limestone quarries and rustic farm barns for shelter and hibernation. Furthermore, it tackles the strict scientific obligation to correct historical errors, emphasizing that wildlife records require verifiable physical vouchers rather than unproven literature citations. The work is ultimately about mapping the hidden biodiversity of the American plains with uncompromising empirical discipline.

Why Read It Today

Readers who appreciate natural history, regional ecology, and the patient craft of scientific fieldwork will find deep satisfaction in this concise monograph. Reading it feels like stepping inside a mid-century academic archive, where every page reflects quiet dedication to field craft, museum curation, and geographical precision. While modern readers might find the dense scientific nomenclature, technical anatomical descriptions, and specialized taxonomic discussions demanding, this uncompromising rigor forms its enduring charm and historical value. It strips away modern gloss to reveal the pure, foundational work of mapping local fauna from scratch through decades of collective inquiry. What stays with you long after finishing is a heightened awareness of the hidden winged life sharing our physical landscapes, safely tucked away in quiet farm barns and dark limestone tunnels across the Midwestern plains.