Ornithology Commons^™

Fall Field Report, August–November 2024, W. Ross Silcock

Nebraska Bird Review

First off, I should reiterate that records are only mentioned in this Introduction and in the text when they add to or fine-tune data included in BONO (Birds of Nebraska – Online (outdoornebraska.gov). It was my expectation that as the number of birders and in particular those reporting to eBird continue to increase, gaps in the database will be filled and my job will become simpler. However, this expectation is yet to be realized, likely due to increasing movements and activity among birds that appears to be due to increasing severity of weather events, such as heat, cold, and drought, …

The Nebraska Bird Review (December 2024) 92(4), Whole Issue

Nebraska Bird Review

Fall Field Report, August–November 2024, by W. Ross Silcock

First Breeding Confirmation for Red-breasted Nuthatch (Sitta canadensis) along the Big Bend Reach of the Platte River, by Jacob C. Cooper, Cody McGregor, Letitia M. Reichart, and Janet Steele

McCook Fall Field Days, Sept. 20–22, 2024, by Gary Roberts

Index to Volume 92

Subscription and Organization Information

Biosense: An Automated Sensing Node For Organismal And Environmental Biology, Andrea Contina, Eric Abelson, Brendan Allison, Brian Stokes, Kenedy F. Sanchez, Henry M. Hernandez, Anna M. Kepple, Quynhmai Tran, Isabella Kazen

School of Integrative Biological & Chemical Sciences Faculty Publications

Automated remote sensing has revolutionized the fields of wildlife ecology and environmental science. Yet, a cost-effective and flexible approach for large scale monitoring has not been fully developed, resulting in a limited collection of high-resolution data. Here, we describe BioSense, a low-cost and fully programmable automated sensing platform for applications in bioacoustics and environmental studies. Our design offers customization and flexibility to address a broad array of research goals and field conditions. Each BioSense is programmed through an integrated Raspberry Pi computer board and designed to collect and analyze avian vocalizations while simultaneously collecting temperature, humidity, and soil moisture data. …

Understanding The Influence Of Traffic And Noise On The Wildlife Community Surrounding Fm106 And Sh100 In South Texas, Anna Rose Mehner

Theses and Dissertations

In South Texas, highways create landscape fragmentation, habitat degradation, and result in wildlife vehicle collisions. Vehicle collisions are the highest known cause of mortality of the endangered ocelot (Leopardus pardalis), which led Texas Department of Transportation to install nine wildlife crossing structures (WCS) on Farm-to-Market 106 and five on State Highway 100. These highways are along Laguna Atascosa National Wildlife Refuge, which is the location of the southernmost breeding population of ocelots in the United States. Many other wildlife species including bobcat (Lynx rufus) and coyote (Canis latrans), are present along these highways and …

Avian Index Of Biotic Integrity: Evaluating Wetland Health In The Red River Basin, Texas/Louisiana, Elexis M. Anderson

Biology Theses

Wetlands play a vital role in maintaining environmental health by filtering pollutants, controlling floods, and providing habitat for diverse species. These ecosystems are essential for sustaining biodiversity and regulating hydrological and biogeochemical cycles. The Red River Basin (The Red River of the South), spanning Texas, Oklahoma, and Louisiana, is home to various types of wetlands, which provide essential habitats to an array of wildlife. However, anthropogenic pressures such as agriculture and urbanization have led to the degradation and loss of these valuable ecosystems. To counter this loss, federal programs such as the Agricultural Conservation Easement Program - Wetland Reserve Easement …

Changes In Morphology, Phenology, Demography Of Several Avian Species Over 18 Years At A Restored Grassland, Ashley Mcmahon, Katie Stumpf, Charlie Muise

Biology Theses

In response to a changing climate and habitat loss, avian species are displaying changes in body size, migration phenology, and demography. Species have often adhered to Allen’s and Bergmann’s rules, displaying increased wing length and decreased body mass, respectively, over time in response to higher temperatures. Additionally, climate change has resulted in earlier spring migration and depending on species, either earlier or later fall migration. Finally, species affected by habitat loss often display male-skewed sex ratios and juvenile skewed age ratios. Our goal was to determine how 1) body size, 2) migration phenology, and 3) demography have changed for grassland …

Temperature Affects Nest Box Selection, Nest Success, And Nestling Size In A Southeastern Population Of Eastern Bluebirds, Katie Stumpf

Georgia Journal of Science

Given the critical role of temperature in avian reproduction, rising global temperatures will likely impact reproductive success of many bird populations. We examined the effect of nest box temperature, nest box color, entrance orientation, distance to forest cover, and distance to water on net box selection, nest success, and nestling size in eastern bluebirds (Sialia sialis) in central Georgia. White painted nest boxes had significantly cooler temperatures than control nest boxes (P < 0.05). However, model selection revealed that eastern bluebird females selected control boxes, despite their overall warmer temperatures. Nest success was associated with year, likely because of high nest predation during the warmer 2022 breeding season (P < 0.05). Nest success was also associated with cooler nest boxes, possibly because incubating females spend more time incubating which can reduce predation risks. Larger nestlings fledged from painted nest boxes, nest boxes with cooler temperatures, and nests from 2021, which we attribute to decreased thermoregulatory demands enabling faster nestling growth in cooler boxes and years. These seemingly opposing results suggest there may be an optimal temperature range where nest box temperature maximizes reproductive fitness while minimizing energetic demands on incubating adults. Determining this temperature range can help target management efforts to ensure specific goals are met.

Little Island, Leah R. Nath

Student Publications

After spending two full months living on a remote island off the coast of Maine, I had a difficult time adjusting to mainland life again; the noise, the people, the lack of birds a shock to my system after getting used to such a different way of living. In this piece, I wanted to capture the feeling of becoming part of Petit Manan island, trying to learn the language of the land and the birds, and then the feeling of loss and change once I left. I hope readers can experience the feeling of falling in love with the island …

Effects Of Land-Use Types On Avian Functional Diversity In Kilimanjaro Region, Tanzania, Ava Joan Boettiger

Tanzania: Wildlife Conservation and Political Ecology

This research examined avian abundance and functional diversity across four human land uses— monoculture, mixed farming, rural, and urban areas—in the Kilimanjaro Region of Northern Tanzania. Conducted in November 2024, the study aimed to assess how different land-use types influence avian composition and functional diversity. A quasi-experimental design was employed, using purposive sampling to select study sites and systematic random sampling point counts to observe bird species present in each land-use type. A literature review was also conducted to classify species into families and categorize them into functional feeding guilds: predators, insectivores, frugivores, granivores, and nectarivores. Statistical analyses, including ANOVA, …

Blackbird, Department Of Primary Industries And Regional Development, Western Australia

Biosecurity factsheets

The introduced common blackbird (Turdus merula) is a pest in eastern Australia. It damages commercial fruit crops and may compete with native birds. The species is prohibited in Western Australia and individuals found here are destroyed.

The Western Australian Organism List (WAOL) contains information on the area(s) in which this pest is declared and the control and keeping categories to which it has been assigned in Western Australia (WA). For more information, see our website at dpird.wa.gov.au.

Semiautomated Generation Of Species-Specific Training Data From Large, Unlabeled Acoustic Datasets For Deep Supervised Birdsong Isolation, Justin Sasek, Brendan Allison, Andrea Contina, David Knobles, Preston Wilson, Timothy Keitt

School of Integrative Biological & Chemical Sciences Faculty Publications

Background

Bioacoustic monitoring is an effective and minimally invasive method to study wildlife ecology. However, even the state-of-the-art techniques for analyzing birdsongs decrease in accuracy in the presence of extraneous signals such as anthropogenic noise and vocalizations of non-target species. Deep supervised source separation (DSSS) algorithms have been shown to effectively separate mixtures of animal vocalizations. However, in practice, recording sites also have site-specific variations and unique background audio that need to be removed, warranting the need for site-specific data.

Methods

Here, we test the potential of training DSSS models on site-specific bird vocalizations and background audio. We used a …

Correcting The Record: Subspecific Identification Of Nebraska’S Lone Common Eider (Somateria Mollissima), Sam Manning, Joel G. Jorgensen, Stephen J. Brenner, W. Ross Silcock

Nebraska Bird Review

In late November or early December 1967, Roger Guenther harvested a Common Eider (Somateria mollissima) on Maloney Canal between Maloney and Sutherland in Lincoln County, Nebraska. The head and a single foot from the carcass were deposited at the University of Nebraska State Museum via the University of Nebraska–Lincoln and the Nebraska Fish and Game Department (now the Game and Parks Commission). Dr. Jean Tate prepared the parts, which were inventoried as specimen #ZM-12341 in the UNSM. Dr. Paul Johnsgard purportedly took this specimen to the Field Museum of Natural History in Chicago for identification purposes, and concluded …

2023 (35th) Report Of The Nou Records Committee, Mark A. Brogie

Nebraska Bird Review

The functions and methods of the Nebraska Ornithologists’ Union Records Committee (NOURC) are described in its bylaws (NOURC 2010). The committee’s purpose is to provide a procedure for documenting unusual bird sightings and to establish a list of all documented birds for Nebraska. Species for which the NOURC seeks documentation (NOURC Review List) can be found at the NOU website https://noubirds.org/Birds/ReviewList.aspx. Starting in 2020, the NOURC decided to deal mainly with those species deemed as Accidental on the “Official List of the Birds of Nebraska”. Casual species and out-of- range species are now summarized in the “Seasonal Reports” of the …

The Nebraska Bird Review (September 2024) 92(3), Whole Issue

Nebraska Bird Review

Summer Field Report, June–July 2024, by W. Ross Silcock

Correcting the Record: Subspecific Identification of Nebraska’s Lone Common Eider (Somateria mollissima), by Sam Manning, Joel G. Jorgensen, Stephen J. Brenner, and W. Ross Silcock

2023 (35th) Report of the NOU Records Committee, by Mark A. Brogie

Subscription and Organization Information

Summer Field Report, June–July 2024, W. Ross Silcock

Nebraska Bird Review

This was an intriguing summer in several ways. I am far from being a knowledgeable ecologist, but, like most of us, as a layman I wonder whether and how weather affects birds, and if and how local weather is reflecting the conventional wisdom of climate change. Climate change seems increasingly to be expressed as various extreme or rapidly changing weather events that have differing effects on vegetation and consequently insect and larger prey populations. Every species responds differently it seems, depending on its biological needs, but food supply is the most important issue for birds. It is tempting to assign …

The Role Of Elevation In The Migration, Physiology, And Genomic Diversification Of Birds, Jessie L. Williamson

Biology ETDs

Elevational gradients cause profound eco-climatic variation across short distances. Partial pressure of oxygen (PO₂) is a severe challenge that organisms face at high elevations; due partly to specialization on PO₂, most Neotropical bird species have narrow elevational ranges. However, a small fraction are elevational generalists that span sea level to high elevations, and a subset undertake extreme migratory journeys from low to high elevations biannually. My dissertation combines diverse approaches across levels of biological organization to understand how elevation impacts the ecology, evolution, physiology, and migration of montane birds. I examined ‘extreme’ elevational …

Avian Communities Monitored Along A Successional Chronosequence In Bottomland Hardwood Forests In The Lower Mississippi Alluvial Valley, Eamonn Alasdair Thurmond

Electronic Theses and Dissertations

Bottomland hardwood forests in the Lower Mississippi Alluvial Valley have been extensively reduced due to agriculture conversion and altered hydrology. Remnant forests have undergone further degradation from sources such as a lack of forest management, invasive species, and reduced regeneration of oaks (Quercus spp.). Recent restoration efforts of bottomland hardwood forests have focused on implementing wildlife forestry practices that prioritize restoring wildlife habitat while retaining profitable timber harvests. In this study I surveyed bird communities in bottomland hardwood forests in the Lower Mississippi Alluvial Valley along a successional chronosequence. Birds were sampled using automated recording units over 10 days …

Sullivan, Frank Victor, Collection, 1924-2005, Special Collections, Leonard H. Axe Library

Finding Aids

This collection contains materials from the life and projects of Dr. Frank “Vic” Victor Sullivan. They document contributions to: the Sperry Galligher Audubon collection of documents; reports on the planning and construction of the Kansas Technology Center at Pittsburg State University; slides of university trips and family.

Hybridization Between The Rare Gray-Headed Chickadee And The Abundant Boreal Chickadee In The Midst Of Shifting Climate, Matthew R. Armstrong

School of Natural Resources: Dissertations, Theses, and Student Research

As species respond to changing climate, distributions and abundances may shift and alter species interactions. Hybridization, a relatively widespread phenomenon becoming more common with climate change, can have beneficial and detrimental effects on population growth rates and genetic integrity. Beneficial effects due to the introduction of advantageous alleles and increased genetic diversity may result from hybridization. Species may also accrue fitness costs associated with changing climates if mismatches occur between environmental variables and phenotypes. The gray-headed chickadee, Poecile cinctus lathami, is an extremely rare songbird that has experienced marked declines in recent decades within its restricted distribution in Alaska …

Asynchronous Movement Patterns Between Breeding And Stopover Locations In A Long-Distance Migratory Songbird, Theodore J. Zenzal Jr., Andrea Contina, Hannah B. Vander Zanden, Leanne K. Kuwahara, Daniel C. Allen, Kristen M. Covino

School of Integrative Biological & Chemical Sciences Faculty Publications

The species-specific migratory patterns and strategies of many songbirds remain unknown or understudied, as research in animal ecology is biased toward the breeding period, with the fewest studies on the migratory period across taxa. Identifying large-scale spatiotemporal migratory patterns is challenging, as individuals within a species may vary in their migratory behavior and strategies. The Yellow Warbler (Setophaga petechia) is a Nearctic-Neotropical migrant that is relatively well studied during the breeding season, but its species-wide migratory patterns remain understudied. Our aim in studying Yellow Warbler movement ecology was to characterize temporal migration patterns during fall migration. We sought …