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Full-Text Articles in Life Sciences

Statistical And Biological Analyses Of Acoustic Signals In Estrildid Finches, Moises Rivera Jun 2023

Statistical And Biological Analyses Of Acoustic Signals In Estrildid Finches, Moises Rivera

Dissertations, Theses, and Capstone Projects

Acoustic communication is a process that involves auditory perception and signal processing. Discrimination and recognition further require cognitive processes and supporting mechanisms in order to successfully identify and appropriately respond to signal senders. Although acoustic communication is common across birds, classical research has largely disregarded the perceptual abilities of perinatal altricial taxa. Chapter 1 reviews the literature of perinatal acoustic stimulation in birds, highlighting the disproportionate focus on precocial birds (e.g., chickens, ducks, quails). The long-held belief that altricial birds were incapable of acoustic perception in ovo was only recently overturned, as researchers began to find behavioral and physiological evidence …


Spatial Conservation Planning In The Southeastern United States: Alignments And Opportunities, Bradly Stewart Thornton May 2023

Spatial Conservation Planning In The Southeastern United States: Alignments And Opportunities, Bradly Stewart Thornton

Theses and Dissertations

Conservation managers and planners need the ‘best available science’ to support robust and defensible decisions, ensuring that public resources are appropriately allocated. Spatial planning products and decision-support tools developed for this purpose should enable partner organizations to achieve focus, coordination, and increased effectiveness in their investments and actions. Whereas conservation partnerships have historically created distinct planning tools, there is increasing interest for improved coordination, communication, and unifying biological datasets to improve the cohesiveness of regional management activities. We sought to inform spatial conservation planning efforts in the southeastern United States through the development of species distribution models for focal avian …


Nesting Success Of American Robins (Turdus Migratorius) In Suburban Areas Of The Arkansas River Valley, Brandon Maiersperger Apr 2023

Nesting Success Of American Robins (Turdus Migratorius) In Suburban Areas Of The Arkansas River Valley, Brandon Maiersperger

ATU Research Symposium

The American Robin (Turdus migratorius) is an abundant North American songbird species that thrives in suburban areas. Estimates of robin nesting success in suburban areas range from 31% to 90%. Robin nest site selection and success have not received much attention in the past few decades. Most passerines have a balanced sex ratio at fledging, but little is known about the fledgling sex ratio of robins. We located 44 robin nests in six public parks around Russellville, AR and on the Arkansas Tech University campus. Nest success was low; 27% (12/44) of nests fledged at least one young. Robins nested …


The History And Significance Of Taxidermy Bird Collections In North America: Bgsu's Own Undervalued Collection And Its Future, Kristin Burnside Apr 2023

The History And Significance Of Taxidermy Bird Collections In North America: Bgsu's Own Undervalued Collection And Its Future, Kristin Burnside

Honors Projects

Taxidermy, despite its association with the bizarre and outlandish, has a rich history and culture that helped to define post-Civil War America and its pursuit of knowledge and reconnection with nature. With the widespread publication and availability of how-to guides, natural history collecting and taxidermy became accessible to any individual regardless of age, gender, or class. The hobby required physicality and courage to collect unique and interesting specimens, and intellect and creativity to conserve and display them, all of which inherently connected the avocation with respect. With varying levels of success, hobbyists experimented with different chemicals, such as arsenic, in …


Increasing Capture Rates Of Grassland Birds Over Thirteen Years Indicates Successful Restoration, Katie Stumpf, Charles Muise Mar 2023

Increasing Capture Rates Of Grassland Birds Over Thirteen Years Indicates Successful Restoration, Katie Stumpf, Charles Muise

Georgia Journal of Science

Grassland bird populations are being lost at an alarming rate due to human modifications to grassland ecosystems. Grassland restoration has been shown to mitigate population declines for many species that use these habitats at some point in their annual cycles. We examined capture rates of adult, breeding, and hatch-year birds at a restored grassland site in the piedmont of central Georgia to determine whether colonization, breeding success, hatching success, and recruitment processes were impacting populations of grassland birds. We banded birds approximately twice per month from January 2009 through December 2021 at Panola Mountain State Park. Restoration efforts started in …


Remembering Paul Johnsgard, Linda R, Brown, Josef Kren Mar 2023

Remembering Paul Johnsgard, Linda R, Brown, Josef Kren

Zea E-Books Collection

Paul A. Johnsgard (1931–2021) was a friend of many, an artist, prolific author, teacher, and humble admirer of all living creatures. It was impossible to find someone at Nebraska Audubon Society or Nebraska Ornithologists’ Union meetings who did not know Paul Johnsgard. His more than 100 published books made him known not just in a community of ornithologists, birdwatchers, and bird lovers in the United States but also abroad. He was a world-renowned ornithologist and naturalist who remained deeply embedded in his local culture and its prairie environment.

We invited about 75 people to write a short memory of Paul. …


Quantifying Insect Emergence In Tidal Freshwaters And The Importance Of Aquatic Prey In Wetland-Dependent Songbird Diet, Samantha L. Rogers Jan 2023

Quantifying Insect Emergence In Tidal Freshwaters And The Importance Of Aquatic Prey In Wetland-Dependent Songbird Diet, Samantha L. Rogers

Theses and Dissertations

Insectivorous birds and their arthropod prey are experiencing widespread population declines, driven largely by anthropogenic disturbance and climate change. For wetland-dependent insectivores that consume a mixture of terrestrial and aquatic insects, understanding the availability, consumption, and nutritional qualities of aquatic diet subsidies is important for conservation. I use prothonotary warblers (Protonotaria citrea) as a model species throughout this work, because their breeding season aligns with aquatic insect emergence and they include aquatic insects when provisioning nestlings. In the first chapter, I estimate aquatic insect emergence from tidal freshwaters, which are understudied compared to nontidal systems. Using continuous field …


Sense-Able Hauntings: Ethics And Narratives In Ornithological Specimen Preservation At Yale's Peabody Museum, Elaina Foley Jan 2023

Sense-Able Hauntings: Ethics And Narratives In Ornithological Specimen Preservation At Yale's Peabody Museum, Elaina Foley

Kaplan Senior Essay Prize for Use of Library Special Collections

Until I was standing in between the rows of towering metal specimen cabinets, I didn’t understand how many birds the Yale Peabody Museum holds. Like most people, I had only experienced the display side of museums: its dioramas and glass cases. These displays, while made to embody a certain set of interests, priorities, and values, still serve an obscuring function—they vastly underrepresent the museum’s total collections. In their ornithology collection alone, the Peabody currently holds more than 152,000 bird skins, bones, eggs, nests, and other avian fragments. The Peabody staff members who maintain the ornithology specimen collections are distinct from …


Advancing Methods Of Diet Analysis: A Case Study Using Degraded Merlin (Falco Columbarius) Prey Remains, Taylor A. Coon Jan 2023

Advancing Methods Of Diet Analysis: A Case Study Using Degraded Merlin (Falco Columbarius) Prey Remains, Taylor A. Coon

Undergraduate Theses, Professional Papers, and Capstone Artifacts

Prey remains have long been used as a mechanism to approach diet analyses. As understanding diet is key to comprehending ecosystem dynamics, prey remains identification requires a unique methodological approach to determine diversity within a sample. With the advancement of technology, molecular protocols designed for species-specific identification have improved to incredible accuracy and precision. Yet, the visual identification method has remained a predominant technique within diet studies. With entry-level observers, we matched visual identifications with molecular-based methods to quantify the accuracy of the visual identification method. This study determined what fraction of visually identified prey remains could be correctly identified …


Telomeres: A Tool To Assess The Impacts Of Mining Contaminants On Riparian Songbirds, Lillian Krach, Bridger Creel, Megan Fylling, Zac Cheviron, Creagh Breuner Jan 2023

Telomeres: A Tool To Assess The Impacts Of Mining Contaminants On Riparian Songbirds, Lillian Krach, Bridger Creel, Megan Fylling, Zac Cheviron, Creagh Breuner

Undergraduate Theses, Professional Papers, and Capstone Artifacts

Mining has left massive environmental and physical scars across the landscape. Aquatic and riparian landscapes in particular have been significantly impacted by traditional mining practices. Waste products left over from hard-rock mining leech heavy metals onto the landscape and these metals spread from headwater streams to major waterways (Lottermoser 2010). Heavy metals have been shown to cause physiological stress and challenges to organisms depending on the metal and the concentration (Baos et al. 2019, Boyd & Rajakaruna 2013). While some mining-impaired areas have undergone restoration efforts, is it enough? Typical restoration methods replace the contaminated floodplain, but not the riverbed …


Assessing Forest Features And Nocturnal Flying Insect Diversity As Predictors Of Eastern Whip-Poor-Will Occupancy In Foraging Habitat, Clark D. Alexander Jan 2023

Assessing Forest Features And Nocturnal Flying Insect Diversity As Predictors Of Eastern Whip-Poor-Will Occupancy In Foraging Habitat, Clark D. Alexander

Graduate Theses, Dissertations, and Problem Reports

Eastern whip-poor-will (Antrostomus vociferus), an insectivorous caprimulgid, have seen an approximate 2.76% annual population decrease since the 1960s, with their breeding and foraging ecology largely unknown due to their nocturnal and cryptic behavior. I conducted research to assess abiotic and biotic variables correlated with detection, and occupancy probability, and prey species diversity on ~104,000 hectares of forest in West Virginia, owned by the private timber company Weyerhaeuser. Previous literature indicates that Eastern whip-poor-will, and their prey, require ephemeral habitat such as recently cleared and early successional forests, like those historically created by forest fires, wind shears, hurricanes, and …


Ecological Diagnosis And Diversity Structure Of The Forest Birds Community In Machroha Forest (Souk Ahras – Northeastern Algeria), Abdelhak Boucif, Mouslim Bara, Moussa Houhamdi Dec 2022

Ecological Diagnosis And Diversity Structure Of The Forest Birds Community In Machroha Forest (Souk Ahras – Northeastern Algeria), Abdelhak Boucif, Mouslim Bara, Moussa Houhamdi

Journal of Bioresource Management

Machroha forest is a large hot spot of biodiversity of northeastern region of Algeria. It is dominated by several species of oak tree that can contribute to the conservation of many animals such as birds. Our study was carried out from February 2019 to July 2021, in order to diagnosis the ecological status of forest birds and their dynamics. Our results reported that this forest was including 19.21% of the Algerian avifauna diversity. We recorded 78 species of birds classified in 32 families. The main species were sedentary with an insectivorous trophic categories and terrestrial guild. Three species observed in …


First Case Of Leucism In The House Bunting Emberiza Sahari In Algeria, Abdelwahab Chedad, Djamel Bendjoudi, Brahim Beladis, Omar Guezoul Dec 2022

First Case Of Leucism In The House Bunting Emberiza Sahari In Algeria, Abdelwahab Chedad, Djamel Bendjoudi, Brahim Beladis, Omar Guezoul

Journal of Bioresource Management

Continue to monitor the bioecology of the House bunting in Algeria and mentioned the birds that carry abnormalities and genetic mutation (Albinism and leucism), including passerines species. A male House bunting Emberiza sahari with leucism (partial albinism) was recorded on December 6, 2021, in the city center of the M'Zab Valley at Ghardaïa (Algerian Sahara).


Seabirds As Proxies For Past El Niño Events In Coastal Peru: An Archaeo-Ornithological Approach, Heather A. Landazuri Dec 2022

Seabirds As Proxies For Past El Niño Events In Coastal Peru: An Archaeo-Ornithological Approach, Heather A. Landazuri

Electronic Theses and Dissertations

This thesis sets an initial foundation for an archaeo-ornithological approach to understanding past El Niño events on the coast of Peru and the use of avifaunal remains as proxies for ecological conditions. Although faunal remains from archaeological sites do not provide exact representations of past environmental conditions, and bird remains can be especially challenging environmental indicators, their presence does reflect decisions made by human occupants in response to environment. Additionally, zooarchaeological data offer a reflection of past animal availability and use, much of which is at least in part determined by environmental conditions. Here I examine the extent to which …


The Distribution And Reproductive Success Of The Western Snowy Plover Along The Oregon Coast - 2022, David J. Lauten, Kathleen A. Castelein, Daniel Farrar, Mary Lee, Eleanor P. Gaines Dec 2022

The Distribution And Reproductive Success Of The Western Snowy Plover Along The Oregon Coast - 2022, David J. Lauten, Kathleen A. Castelein, Daniel Farrar, Mary Lee, Eleanor P. Gaines

Institute for Natural Resources Publications

We monitored the distribution, abundance and productivity of the federally threatened Western Snowy Plover (Charadrius nivosus nivosus) along the central and south coast of Oregon from 1 April – 15 September 2022. We surveyed and monitored plover activity in a project area that included, from north to south, Sutton Beach, Siltcoos River estuary, the Dunes Overlook, North Tahkenitch Creek, Tenmile Creek, Coos Bay North Spit, Bandon Snowy Plover Management Area, New River Habitat Restoration Area (HRA) and adjacent lands, and Floras Lake. Our objectives for the project area in 2022 were to: 1) estimate the size of the adult Snowy …


Temperature Affects Nest Box Occupancy, Nest Success, And Nestling Size In A Southeastern Population Of Eastern Bluebirds (Sialia Sialis), Christopher G. Horacek Nov 2022

Temperature Affects Nest Box Occupancy, Nest Success, And Nestling Size In A Southeastern Population Of Eastern Bluebirds (Sialia Sialis), Christopher G. Horacek

Biology Theses

Given the critical role that temperature plays in avian reproductive biology, rising temperatures as a result of global climate change will likely impact reproductive success of many bird populations. Secondary cavity nesting birds, many of which rely on artificial nest boxes to maintain population levels, may be particularly at risk because increased temperatures inside nest boxes can determine whether nest boxes are selected, reduce nest success, and/or negatively affect the growth and survival of offspring. We examined the effect of nest box color on nest box temperature and the influence of nest box temperature, nest box color, entrance orientation, and …


The Role Of Frugivorous Birds As Seed Dispersers: Feeding Selection And Preference Of Madagascar’S Avian Frugivores In Analamazaotra Forest, Thaddeus Bashaw Oct 2022

The Role Of Frugivorous Birds As Seed Dispersers: Feeding Selection And Preference Of Madagascar’S Avian Frugivores In Analamazaotra Forest, Thaddeus Bashaw

Independent Study Project (ISP) Collection

Madagascar is a country rich in floral and faunal diversity. However, anthropogenic habitat destruction and climate change increasingly threaten its biodiversity. Endozoochorous plants that dependent on frugivory for seed dispersal are under threat due to increasing rates of localized extinctions of frugivorous lemurs, the primary seed dispersers of the island. While lemurs are the islands most abundant frugivores, other frugivorous vertebrates like birds and bats likely play a significant role in seed dispersal, although this role is still poorly understood. This study, conducted in Analamazaotra forest, compares the rates of visitation and consumption of six endemic fruiting tree species by …


The Nesting Behavior Of Russet-Backed Oropendola On Sumak Allpa, Ecuador: An Analysis Of Nest Construction And Interactions With Competing Species, Claire Molina Oct 2022

The Nesting Behavior Of Russet-Backed Oropendola On Sumak Allpa, Ecuador: An Analysis Of Nest Construction And Interactions With Competing Species, Claire Molina

Independent Study Project (ISP) Collection

Nests are the literal place of birth of bird species; they are incredibly important in the survival and reproduction of populations. Therefore, nesting behavior is a gateway into the lives and success of the animals. With the degradation of natural landscapes due to human activity, there is more of a need to monitor these nests to ensure healthy inhabitants. The Russet-backed Oropendola (Psarocolius angustifrons) creates unique, pendulous nests that are subject to piracy, parasitism, and predation; as well as weather phenomenon’s such as wind and rainstorms. This study describes the nest construction behavior, nest materials and nest architecture by collecting …


Importance And Winter Ornithological Value Of Lake El-Golea (Ghardaïa, Algerian Sahara, Biad Radhia, Bounab Choayb, Guergueb El Yamine, Biad Mohamed Fetheddine, Houhamdi Moussa Sep 2022

Importance And Winter Ornithological Value Of Lake El-Golea (Ghardaïa, Algerian Sahara, Biad Radhia, Bounab Choayb, Guergueb El Yamine, Biad Mohamed Fetheddine, Houhamdi Moussa

Journal of Bioresource Management

This study is carried out on two winter period (2018-2019 and 2019-2020) in Lake El-Golea (Ghardaïa, northern Sahara of Algeria). Its objective is to determine the ornithological value of this lake and to in ferits importance in maintaining aquatic avifauna during the winter season. This inventory shows a diversity equivalent to forty-one species belonging to thirteen families and nine orders of which eighteen are protected by various Algerian and international laws. The most represented family is that of the Anatidae with twelve species while the family with the highest number is that of the Phenicopteridae represented only by one species, …


Winter Diet Of Montezuma Quail In Arizona And New Mexico, Oscar E. López-Bujanda, Alberto Macías-Duarte, Reyna A. Castillo-Gámez, Angel B. Montoya Sep 2022

Winter Diet Of Montezuma Quail In Arizona And New Mexico, Oscar E. López-Bujanda, Alberto Macías-Duarte, Reyna A. Castillo-Gámez, Angel B. Montoya

National Quail Symposium Proceedings

Investigating the diet composition of Montezuma quail (Cyrtonyx montezumae) is fundamental for unveiling how food resources limit the species’ population size and may provide relevant tools for their harvest and habitat management. The objective of this research was to determine the composition and geographic variation of the winter diet of the Montezuma quail in Arizona and New Mexico, USA, from quail crops harvested during the hunting seasons of 2008–2017. In addition, we used beta regression analyses to determine the effect of environmental factors and ecological variables (annual mean precipitation, annual mean temperature, landscape diversity, diet diversity, time of …


Composition Of The Montezuma Quail’S Diet In Arizona, New Mexico, And Texas, Ana G. Paredes-Acuña, Alberto Macías-Duarte, Reyna A. Castillo-Gámez, Angel B. Montoya, James H. Weaver Sep 2022

Composition Of The Montezuma Quail’S Diet In Arizona, New Mexico, And Texas, Ana G. Paredes-Acuña, Alberto Macías-Duarte, Reyna A. Castillo-Gámez, Angel B. Montoya, James H. Weaver

National Quail Symposium Proceedings

The Montezuma quail (Cyrtonyx montezumae) is a popular game bird and an indicator species of oak-pine savannas in the northern part of its range. In Arizona and New Mexico, USA, robust populations allow for a hunting season from mid-November through mid-February. However, there is no open hunting season for this quail in Texas, USA. Data on the Montezuma quail’s diet can provide new information and improve management of the species. Our objective was to analyze the diet composition of the Montezuma quail in Arizona, New Mexico, and Texas. Specimens were collected by hunters in Arizona and New Mexico …


Population Density Estimates Of The Montezuma Quail (Cyrtonyx Montezumae) In West Texas, Alberto Macías-Duarte, Angel B. Montoya, James H. Weaver Sep 2022

Population Density Estimates Of The Montezuma Quail (Cyrtonyx Montezumae) In West Texas, Alberto Macías-Duarte, Angel B. Montoya, James H. Weaver

National Quail Symposium Proceedings

In Texas, USA, populations of Montezuma quail (Cyrtonyx montezumae) can be found scattered across mountain ranges in the Trans-Pecos region, including the Davis and Guadalupe, and farther east into the Edwards Plateau region. Abundance and distribution information to assist land managers in the enhancement of Montezuma quail populations is scarce due to the species’ secretive behavior and unknown abundance. We aimed to provide population density indices to fill this information gap by using a search path technique. We searched for quail in the winter of 2018–2019 in West Texas at 6 study sites: 5 private ranches and Elephant …


Subscription And Organization Information Sep 2022

Subscription And Organization Information

Nebraska Bird Review

logists’ Union, Inc., as its official journal, and is sent to members not in arrears of dues. Annual subscription rates (on a calendar-year basis only): $25 in the United States and $35 in all other countries, payable in advance. Single copies are $7 each, postpaid, in the United States and $9 elsewhere. Send orders for back issues to Anita Breckbill, NOU Librarian, c/o Music Library, WMB 30, University of Nebraska, Lincoln, NE 68588-0101 (or at the email address listed below). Memberships in the NOU (on a calendar-year basis only): Active Household (one or more people) $25; Sustaining Household (one or …


Summer Field Report, June-July 2022, W. Ross Silcock Sep 2022

Summer Field Report, June-July 2022, W. Ross Silcock

Nebraska Bird Review

As always, the summer season produces surprises, and this year was no exception. Surprises fall into different categories, though: genuine statewide rarities, within-state distributional rarities, and, of course in summer, nesting records at new locations, population notes, late and early dates and high numbers, increased knowledge about subspecies in the state, and miscellaneous things of interest. These categories are covered separately below after some housekeeping comments.

“Genuine statewide rarities” were led by the first state record Limpkin found by Karen Kader and seen by many in Sarpy Co. Potential 2nd or so state records were a Mexican Duck in Scotts …


The Nebraska Bird Review. Volume 90 September 2022 Number 3 Sep 2022

The Nebraska Bird Review. Volume 90 September 2022 Number 3

Nebraska Bird Review

Summer Field Report, June - July 2022 by W. Ross Silcock ….90

2021 (33rd) Report of the NOU Records Committee by Mark A. Brogie … 113

Subscription and Organization Information … 123


2021 (33rd) Report Of The Nou Records Committee, Mark A. Brogie Sep 2022

2021 (33rd) 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 www.NOUbirds.org. 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 …


Recruitment, Cost Indexes, And Management Of Box-Nesting Wood Ducks In South Carolina And North Carolina, Emily Miller Aug 2022

Recruitment, Cost Indexes, And Management Of Box-Nesting Wood Ducks In South Carolina And North Carolina, Emily Miller

All Theses

The wood duck (Aix sponsa) has experienced one of the most significant declines and recoveries among species of North American waterfowl (Anatidae). With enactment of the Migratory Bird Treaty Act (1918) and installation of hundreds of thousands of artificial nest structures for this cavity-nesting species in North America, wood duck populations have recovered and remain a sustainable harvested resource. However, long-term research on box-nesting wood ducks conducted at the Savannah River Ecology Laboratory, Aiken, South Carolina, has revealed uncertainty as to whether recruitment rates of yearling females from natal box-nesting populations are self-sustaining without immigration of hens from …


Histomonosis In Turkeys – Factors Influencing Transmission, Pathogenesis, And The Search For Prophylactic Or Therapeutic Compounds, Thainá Landim De Barros Aug 2022

Histomonosis In Turkeys – Factors Influencing Transmission, Pathogenesis, And The Search For Prophylactic Or Therapeutic Compounds, Thainá Landim De Barros

Graduate Theses and Dissertations

The incidence of histomonosis has been increasing in poultry since the ban of prophylactic and therapeutic compounds. Histomonosis is caused by the protozoa Histomonas meleagridis. The objective of this dissertation was to investigate factors impacting the pathogenesis and transmission of histomonosis and to evaluate compounds that could potentially prevent or reduce the severity of histomonosis in turkeys. In the first study, the effect of sodium chlorate and sodium nitrate on reducing histomonads growth was tested in vitro and added to a basal turkey diet. A decrease in the growth of histomonads in vitro was observed, but no in vivo effect …


The Role Of Nest Location On The Reproductive Success Of Piping Plovers Breeding At Rockaway Beach, New York, Clara I.D. Arndtsen Jul 2022

The Role Of Nest Location On The Reproductive Success Of Piping Plovers Breeding At Rockaway Beach, New York, Clara I.D. Arndtsen

Theses and Dissertations

The study’s goal was to learn what aspects of the piping plover experience affect reproductive outcomes at Rockaway Beach Endangered Species Nesting Area. Nest location was found to help predict reproductive success. Nests further from American oystercatcher nests were likely to fledge more chicks. Reproductive success was low in 2021.


Breeding Ecology Of Mottled Ducks In Southwestern Louisiana, Elizabeth Sophia Bonczek Jul 2022

Breeding Ecology Of Mottled Ducks In Southwestern Louisiana, Elizabeth Sophia Bonczek

LSU Doctoral Dissertations

Mottled ducks are a resident species found in the southern United States that rely on coastal marsh and associated habitat to fulfill the needs of the entirety of their annual cycle. Population monitoring has revealed declines in western Gulf Coast (WGC) mottled ducks since 2008. Mottled duck populations are influenced by survival and recruitment, and changes in these factors may contribute to population declines. The overarching goal of this project was to identify the mechanisms potentially limiting WGC mottled ducks.

I captured adult female mottled ducks during molt on Rockefeller Wildlife Refuge and adjacent lands in southwestern Louisiana from 2017–2019. …