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Full-Text Articles in Ornithology

Global Warming And Population Responses Among Great Plains Birds, Paul A. Johnsgard Feb 2015

Global Warming And Population Responses Among Great Plains Birds, Paul A. Johnsgard

Zea E-Books Collection

Based on an analysis of 47 years (1967–2014) of Audubon Christmas Bird Counts (CBC), evidence for population changes and shifts in early winter (late December) ranges of nearly 150 species of birds in the Great Plains states is summarized, a region defined as including the Dakotas, Nebraska, Kansas, Oklahoma, and the Texas panhandle. The rationale for this study had its origins in Terry Root’s 1988 Atlas of North American Wintering Birds. Root’s landmark study provided a baseline for evaluating the nationwide winter distributions of 253 North American birds in the mid-20th century, using data from the National Audubon Society’s …


Ectoparasitism Shortens The Breeding Season In A Colonial Bird, Charles R. Brown, Mary Bomberger Brown Feb 2015

Ectoparasitism Shortens The Breeding Season In A Colonial Bird, Charles R. Brown, Mary Bomberger Brown

School of Natural Resources: Faculty Publications

When blood-feeding parasites increase seasonally, their deleterious effects may prevent some host species, especially those living in large groups where parasites are numerous, from reproducing later in the summer. Yet the role of parasites in regulating the length of a host’s breeding season—and thus the host’s opportunity for multiple brooding—has not been systematically investigated. The highly colonial cliff swallow (Petrochelidon pyrrhonota), a temperate-latitude migratory songbird in the western Great Plains, USA, typically has a relatively short (eight to nine week) breeding season, with birds rarely nesting late in the summer. Colonies at which ectoparasitic swallow bugs (Oeciacus vicarius) were experimentally …


2015 Interior Least Tern And Piping Plover Monitoring, Research, Management, And Outreach Report For The Lower Platte River, Nebraska, Mary Bomberger Brown, Lauren R. Dinan, Joel G. Jorgensen Jan 2015

2015 Interior Least Tern And Piping Plover Monitoring, Research, Management, And Outreach Report For The Lower Platte River, Nebraska, Mary Bomberger Brown, Lauren R. Dinan, Joel G. Jorgensen

School of Natural Resources: Faculty Publications

Abstract:

This document reports on our monitoring, research, management, and outreach activities during the past 12 months (2014–2015). We prepared it to inform our partners, cooperating agencies, funding sources, and other interested parties of our activities and to provide a preliminary summary of our results.

The lower Platte River and its major tributaries provide important nesting and migratory stopover habitat for two bird species of special conservation concern: the state and federally endangered Interior Least Tern (Sternula antillarum athalassos) and threatened Piping Plover (Charadrius melodus). The Tern and Plover Conservation Partnership (TPCP), based at the University …


Wpa News 98 (2015), World Pheasant Association Jan 2015

Wpa News 98 (2015), World Pheasant Association

Galliformes Specialist Group and Affiliated Societies: Newsletters

WPA News (Winter 2015), number 98

Published by the World Pheasant Association


Female Breakfast Skippers Display A Disrupted Cortisol Rhythm And Levated Blood Pressure, Megan Witbracht, Nancy L. Keim, Shavawn Forester, Adrianne Widaman, Kevin D. Laugero Jan 2015

Female Breakfast Skippers Display A Disrupted Cortisol Rhythm And Levated Blood Pressure, Megan Witbracht, Nancy L. Keim, Shavawn Forester, Adrianne Widaman, Kevin D. Laugero

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Chronic stress and over-activity in the hypothalamic–pituitary–adrenal (HPA) axis may link breakfast skipping and poor cardiometabolic health. Missing the first major meal of the day in rodents prolongs elevated circulating corticosterone at a time when it's normally decreasing. To extend these findings to humans, we hypothesized that habitual breakfast skippers would display a similar pattern of circulating cortisol and alterations in meal and stress-induced cortisol reactions. Normal weight to obese women aged 18–45 years old who were strictly defined as either breakfast skippers (n = 30) or breakfast eaters (n = 35) were invited to participate in our …


The Effect Of Weather During Rearing On Morphometric Traits Of Juvenile Cliff Swallows, Erin A. Roche, Mary Bomberger Brown, Charles R. Brown Dec 2014

The Effect Of Weather During Rearing On Morphometric Traits Of Juvenile Cliff Swallows, Erin A. Roche, Mary Bomberger Brown, Charles R. Brown

School of Natural Resources: Faculty Publications

Episodes of food deprivation may change how nestling birds allocate energy to the growth of skeletal and feather morphological traits during development. Cliff swallows (Petrochelidon pyrrhonota) are colonial, insectivorous birds that regu­larly experience brief periods of severe weather–induced food deprivation during the nesting season which may affect offspring development. We investigated how annual variation in timing of rearing and weather were associated with length of wing and tail, skeletal traits, and body mass in juvenile cliff swallows reared in southwestern Nebraska during 2001–2006. As predicted under conditions of food deprivation, nestling skeletal and feather measurements were generally smaller …


Fall Field Report, August–November 2014, W. Ross Silcock Dec 2014

Fall Field Report, August–November 2014, W. Ross Silcock

Nebraska Bird Review

My first paragraph from last year's fall report read as follows: "In most ways, this was a routine fall season. Most interesting from an ongoing point of view were quite a large number of sightings of passerines at rather late dates, notably among Empidonax flycatchers, wood warblers, native sparrows, tanagers, towhees, grosbeaks, and buntings." This fall was no different; the trend seems to be that final sighting dates for many species are pushing against their latest expected dates.

There were several tidbits of interest, more or less unrelated, but perhaps most notable takeaways for the season were the number of …


Holdrege Fall Field Days, Janis Paseka Dec 2014

Holdrege Fall Field Days, Janis Paseka

Nebraska Bird Review

The 2014 NOU Fall Field Days took place in Holdrege at the Super 8 Motel on Sept. 19–21. There were about 35 in attendance at the meeting, which was organized by Dave Heidt and Betty Grenon.

On Friday evening Dave Heidt led a humor-filled discussion on bird songs and calls and ways to remember them, as audience members suggested their own mnemonic devices. On Saturday evening, T. J. Walker gave a presentation on the Nebraska Game and Parks' program of habitat rehabilitation to benefit Ring-necked Pheasants and other species. Field trip destinations on Saturday and on Sunday morning included Harlan …


Index To Volume 82 Dec 2014

Index To Volume 82

Nebraska Bird Review

Abegglen, Jeff 192
Abraham, K. F. 85
Aderman, T. 80
Addy, Darren 47
Adrian, Brad 47
Ahlschwede, Carla 40
Akers, Danny 100
Alberts: Byron 143; Deb 143
Alisaukis, R. T. 85
Allen: Edward 3, 48, 143, 153; Jan 48
Allison, Scott 49
American Ornithologists' Union 192

. . .

Wright, Rick 49
Wylie, Bruce 41

Yantachka, Jennifer 143
Yellowlegs: Greater 55, 88, 108, 160, 183; Lesser 56, 88, 108, 160, 183
Yellowtbroat, Common 26, 67, 91, 117, 175, 184

Zahurones, Penny 41
Ziolkowski, D. J. 80


Subscription And Organization Information [December 2014] Dec 2014

Subscription And Organization Information [December 2014]

Nebraska Bird Review

The Nebraska Bird Review is published quarterly by the Nebraska Ornithologists' 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.

Memberships in the NOU (on a calendar-year basis only): Active Household (one or more people) $25; Sustaining …


In Memory Of Margaret Triplett Dec 2014

In Memory Of Margaret Triplett

Nebraska Bird Review

The NOU lost a longtime member in Kearney on August 7, 2014, when Margaret Sealing Triplett died.


Summary Of Raptor Banding Efforts At Hitchcock Nature Center, Fall 2014, Jerry Toll Dec 2014

Summary Of Raptor Banding Efforts At Hitchcock Nature Center, Fall 2014, Jerry Toll

Nebraska Bird Review

The 2014 season was by far the most unusual and frustrating season since the inception of raptor banding and hawk watch at the Hitchcock Nature Center in Pottawatomie County, Iowa, just north of Crescent. Banding diurnal raptors commenced on September 7th on schedule. The month of September was typical as far as capture rates and weather systems, although we were stymied somewhat by the lack of availability of European Starlings for lure birds. House Sparrows proved a nearly adequate substitute.

During the peak period of October, weather systems that drive diurnal raptor migration worked against monitoring efforts by forcing migration …


First Documented Nest Of Northern Saw-Whet Owl In Nebraska, Wayne J. Mollhoff Dec 2014

First Documented Nest Of Northern Saw-Whet Owl In Nebraska, Wayne J. Mollhoff

Nebraska Bird Review

Northern Saw-whet Owl was added to our avifauna with a list prepared by Taylor and Van Vleet (1889). The first suggestion of breeding was a second-hand report included in a paper presented at the first meeting of the Nebraska Ornithologists' Union in 1899 by M. A. Carriker, Jr., who "was told of a set of five eggs collected near Nebraska City about seven years ago" (1900), but which included no other details. At the next meeting, Bruner (1901) cited that report to include the species on a list of birds that breed in the state. Bruner, Swenk, and Walcott later …


Nebraska Bird Review (December 2014) 82(4), Whole Issue Dec 2014

Nebraska Bird Review (December 2014) 82(4), Whole Issue

Nebraska Bird Review

Fall Field Report, August–November 2014 ... 150

Holdrege Fall Field Days … 181

Summary of Raptor Banding Efforts at Hitchcock Nature Center, Fall 2014 ... 186

First Documented Nest of Northern Saw-whet Owl in Nebraska ... 189

In Memory of Margaret Triplett … 194

Index to Volume 82 … 195

Subscription and Organization Information ... 207


Comparative Genomics Reveals Insights Into Avian Genome Evolution And Adaptation, Guojie Zhang, Cai Li, Qiye Li, Bo Li, Dennis M. Larkin, Chul Lee, Jay F. Storz, Agostinho Antunes, Matthew J. Greenwold, Robert W. Meredith, Anders Ödeen, Jie Cui, Qi Zhou, Luohao Xu, Hailin Pan, Zongji Wang, Lijun Jin, Pei Zhang, Haofu Hu, Wei Yang, Jiang Hu, Jin Xiao, Zhikai Yang, Yang Liu, Qiaolin Xie, Hao Yu, Jinmin Lian, Ping Wen, Fang Zhang, Hui Li, Yongli Zeng, Zijun Xiong, Shiping Liu, Long Zhou, Zhiyong Huang, Na An, Jie Wang, Quimei Zheng, Yingqi Xiong, Guangbiao Wang, Bo Wang, Jingjing Wang, Yu Fan, Rute R. Da Fonseca, Alonzo Alfaro-Núñez, Mikkel Schubert, Ludovic Orlando, Tobias Mourier, Jason T. Howard, Ganeshkumar Ganapathy, Andreas Pfenning, Osceola Whitney, Miriam V. Rivas, Erina Hara, Julia Smith, Marta Farré, Jitendra Narayan, Gancho Slavov, Michael N. Romanov, Rui Borges, João Paulo Machado, Imran Khan, Mark S. Springer, John Gatesy, Federico G. Hoffmann, Juan C. Opazo, Olle Håstad, Roger H. Sawyer, Heebal Kim, Kyu-Won Kim, Hyeon Jeong Kim, Seoae Cho, Ning Li, Yinhua Huang, Michael W. Bruford, Xiangjiang Zhan, Andrew Dixon, Mads F. Bertelsen, Elizabeth Derryberry, Wesley Warren, Richard K. Wilson, Shengbin Li, David A. Ray, Richard E. Green, Stephen J. O'Brien, Darren Griffin, Warren E. Johnson, David Haussler, Oliver A. Ryder, Eske Willerslev, Gary R. Graves, Per Alström, Jon Fjeldså, David P. Mindell, Scott V. Edwards, Edward L. Braun, Carsten Rahbek, David W. Burt, Peter Houde, Yong Zhang, Huanming Yang, Jian Wang, Avian Genome Consortium, Erich D. Jarvis, M. Thomas P. Gilbert, Jun Wang Dec 2014

Comparative Genomics Reveals Insights Into Avian Genome Evolution And Adaptation, Guojie Zhang, Cai Li, Qiye Li, Bo Li, Dennis M. Larkin, Chul Lee, Jay F. Storz, Agostinho Antunes, Matthew J. Greenwold, Robert W. Meredith, Anders Ödeen, Jie Cui, Qi Zhou, Luohao Xu, Hailin Pan, Zongji Wang, Lijun Jin, Pei Zhang, Haofu Hu, Wei Yang, Jiang Hu, Jin Xiao, Zhikai Yang, Yang Liu, Qiaolin Xie, Hao Yu, Jinmin Lian, Ping Wen, Fang Zhang, Hui Li, Yongli Zeng, Zijun Xiong, Shiping Liu, Long Zhou, Zhiyong Huang, Na An, Jie Wang, Quimei Zheng, Yingqi Xiong, Guangbiao Wang, Bo Wang, Jingjing Wang, Yu Fan, Rute R. Da Fonseca, Alonzo Alfaro-Núñez, Mikkel Schubert, Ludovic Orlando, Tobias Mourier, Jason T. Howard, Ganeshkumar Ganapathy, Andreas Pfenning, Osceola Whitney, Miriam V. Rivas, Erina Hara, Julia Smith, Marta Farré, Jitendra Narayan, Gancho Slavov, Michael N. Romanov, Rui Borges, João Paulo Machado, Imran Khan, Mark S. Springer, John Gatesy, Federico G. Hoffmann, Juan C. Opazo, Olle Håstad, Roger H. Sawyer, Heebal Kim, Kyu-Won Kim, Hyeon Jeong Kim, Seoae Cho, Ning Li, Yinhua Huang, Michael W. Bruford, Xiangjiang Zhan, Andrew Dixon, Mads F. Bertelsen, Elizabeth Derryberry, Wesley Warren, Richard K. Wilson, Shengbin Li, David A. Ray, Richard E. Green, Stephen J. O'Brien, Darren Griffin, Warren E. Johnson, David Haussler, Oliver A. Ryder, Eske Willerslev, Gary R. Graves, Per Alström, Jon Fjeldså, David P. Mindell, Scott V. Edwards, Edward L. Braun, Carsten Rahbek, David W. Burt, Peter Houde, Yong Zhang, Huanming Yang, Jian Wang, Avian Genome Consortium, Erich D. Jarvis, M. Thomas P. Gilbert, Jun Wang

Jay F. Storz Publications

Birds are the most species-rich class of tetrapod vertebrates and have wide relevance across many research fields. We explored bird macroevolution using full genomes from 48 avian species representing all major extant clades. The avian genome is principally characterized by its constrained size, which predominantly arose because of lineage-specific erosion of repetitive elements, large segmental deletions, and gene loss. Avian genomes furthermore show a remarkably high degree of evolutionary stasis at the levels of nucleotide sequence, gene synteny, and chromosomal structure. Despite this pattern of conservation, we detected many non-neutral evolutionary changes in protein-coding genes and noncoding regions. These analyses …


The Figure Of Bitu-Man, Paul Royster Oct 2014

The Figure Of Bitu-Man, Paul Royster

University of Nebraska-Lincoln Libraries: Faculty Publications

The ominously imposing figure in the above illustration is “the Syncrude bird deterrent device, locally known as ‘Bitu-man’.” He stands (or stood—the original image was from the late 1970s) in the tailings pond of the Syncrude Canada Ltd. oil sands mining operation along the Athabasca River near Fort McMurray in northeastern Alberta. That operation surface mines (i.e., strip mines) bitumen-impregnated sand, processes it with hot water and steam, and discharges the liquid effluent or “tailings” into a pond covering roughly 3000 hectares (11 square miles). (Google Map coordinates: 56.9°N, -111.3° W). Residue bitumen collects on the surface and poses a …


Breeding Time In A Migratory Songbird Is Predicted By Drought Severity And Group Size, Charles R. Brown, Mary Bomberger Brown Oct 2014

Breeding Time In A Migratory Songbird Is Predicted By Drought Severity And Group Size, Charles R. Brown, Mary Bomberger Brown

School of Natural Resources: Faculty Publications

Global climate change is altering the breeding phenology of many organisms, and one reported consequence of warmer average temperatures is earlier breeding times in migratory songbirds of north temperate latitudes. Less studied are the potential interactions between earlier breeding and social behavior in colonial species. We investigated how breeding time, as measured by colony initiation dates across the entire summer, in Cliff Swallows (Petrochelidon pyrrhonota) of southwestern Nebraska, USA, changed over a 30-year period and could be predicted by climatic variables, year, and colony size. Mean colony initiation date became earlier over the study, with variation best predicted …


Game Birds Of The World: A Catalog Of The Madson Collection, Paul A. Johnsgard, Eric Fowler, Michael Forsberg, Mary Bomberger Brown, Dee Ebbeka, Jacki Loomis, Patricia W. Freeman Sep 2014

Game Birds Of The World: A Catalog Of The Madson Collection, Paul A. Johnsgard, Eric Fowler, Michael Forsberg, Mary Bomberger Brown, Dee Ebbeka, Jacki Loomis, Patricia W. Freeman

Paul Johnsgard Collection

This remarkable collection of ornithological specimens is a gift of Everett C. Madson, M.D., a graduate of the University of Nebraska-Lincoln, to the University of Nebraska State Museum in honor of Paul Johnsgard, Ph.D., Professor Emeritus of the School of Biological Sciences.

Contents:

Foreword

Introduction

Biography - Paul A. Johnsgard

Biography - Everett C. Madson

Species Profiles and Photographs

Tinamous (Order Tinamiformes, Family Tinamidae)

Spotted Tinamou (Nothura maculosa)

Waterfowl (Order Anseriformes)

Ducks, Geese and Swans (Family Anatidae)

Whistling Ducks (Tribe Dendrocygnini)

White-faced Whistling Duck (Dendrocygna vidu

Geese and Swans (Tribe Anserini)

Black Swan (Cygnus atratus).

Tundra [Whistling] Swan (Cygnus columbianus) …


Contact Zone Of The Eastern And Western Marsh Wrens In Nebraska Revisited, Mark B. Robbins Sep 2014

Contact Zone Of The Eastern And Western Marsh Wrens In Nebraska Revisited, Mark B. Robbins

Nebraska Bird Review

Across the northern and coastal United States and southern central Canada the Marsh Wren (Cistothorus palustris) is a widespread breeder in cattail-dominated marshes. Although it has long been considered to be polytypic based on subtle plumage characters (Parkes 1959; Phillips 1986), it was not until Kroodsma (1989, 2005) demonstrated that there was a dramatic break in the primary (song) vocalization in the northern Great Plains that anyone suggested more than one species was involved. In 1986, as part of the delineation of the breeding distribution of both vocal types, Kroodsma (1988; see map therein) audio recorded wrens at …


Nebraska Bird Review (September 2014) 82(3), Whole Issue Sep 2014

Nebraska Bird Review (September 2014) 82(3), Whole Issue

Nebraska Bird Review

Summer Field Report, June–July 2014 ... 98

Stomach Content Analysis of Recent Snowy Owl (Bubo scandiacus) Specimens from Nebraska … 122

Contact Zone of the Eastern and Western Marsh Wrens in Nebraska Revisited ... 128

2013 (25th) Report of the NOU Records Committee ... 131

Subscription and Organization Information ... 147


Summer Field Report, June–July 2014, W. Ross Silcock Sep 2014

Summer Field Report, June–July 2014, W. Ross Silcock

Nebraska Bird Review

This summer was marked by the "unremarkability," if there is such a thing, of the status of almost all species, especially passerines. A stark exception, however, was the pair of summering hummingbirds in a yard a few miles southeast of Chadron: Juanita Whittecar sent a collection of very good photos of these birds, detailed enough to determine that the pair of supposed Ruby-throated Hummingbirds actually consisted of a female Ruby-throated and a hybrid Ruby-throated x Broad-tailed male. Another odd phenomenon was the number of shorebird species with late Jun records, usually the brief window within which these species are absent …


Subscription And Organization Information [September 2014] Sep 2014

Subscription And Organization Information [September 2014]

Nebraska Bird Review

The Nebraska Bird Review is published quarterly by the Nebraska Ornithologists' 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.

Memberships in the NOU (on a calendar-year basis only): Active Household (one or more people) $25; Sustaining …


2013 (25th) Report Of The Nou Records Committee, Mark A. Brogie Sep 2014

2013 (25th) Report Of The Nou Records Committee, Mark A. Brogie

Nebraska Bird Review

The "Official List of the Birds of Nebraska" was first published in 1988 (NOU 1988) and has been updated three times (NOURC 1997, 2004, 2009). The "Official List" has been appended twenty-three times: (Mollhoff 1989; Grenon 1990, 1991; Gubanyi 1996a, 1996b, 1996c; Brogie 1997, 1998, 1999, 2003, 2004, 2005, 2006, 2007, 2008, 2009a, 2009b, 2011, 2012, 2013; Jorgensen 2001, 2002, 2003).

The American Ornithologists' Union Checklist of North American Birds, Seventh Edition (1998) and its following supplements: (AOU: 2000, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013) contain many taxonomic changes affecting North American birds.

The …


Stomach Content Analysis Of Recent Snowy Owl (Bubo Scandiacus) Specimens From Nebraska, Rachel L. Valenziano, Thomas E. Labedz Sep 2014

Stomach Content Analysis Of Recent Snowy Owl (Bubo Scandiacus) Specimens From Nebraska, Rachel L. Valenziano, Thomas E. Labedz

Nebraska Bird Review

The Snowy Owl (Bubo scandiacus) is a circumpolar bird of prey that breeds in extreme northern latitudes, including Canadian and Alaskan tundra. During winter months, some immature and non-breeding birds disperse south. North American birds may travel to southern Canada and northern parts of the United States, and in some extreme cases as far south as Oklahoma and Texas (Parmelee 1992). Although not fully understood, these irruptive events may be caused by the abundance of prey in northern Canada and Alaska (Parmelee 1992).

Prey typical of Snowy Owls are small mammals (e.g., lemmings and hares) of their home range and …


Música De Las Grullas: Una Historia Natural De Las Grullas De América, Paul A, Johnsgard, Enrique H. Weir, Karine Gil-Weir Sep 2014

Música De Las Grullas: Una Historia Natural De Las Grullas De América, Paul A, Johnsgard, Enrique H. Weir, Karine Gil-Weir

Zea E-Books Collection

En un sábado mágico de marzo, maneje con un estudiante de postgrado hasta el valle central del Platte, al oeste de Grand Island, tanto para ver la migración primaveral de aves acuáticas como la de las grullas grises. Tal vez fue una suerte que yo no estuviera preparado emocionalmente para ver como innumerables grullas salpicaban el cielo de horizonte a horizonte, o girando grácilmente sus cabezas como si estuvieran atrapados en algún torbellino de ultra cámara lenta, su vibrato produce una cadencia descendente como la música de un coro aviar angelical. Desde los días de mi infancia, cuando, por primera …


Wpa News 94 (2014), World Pheasant Association Jul 2014

Wpa News 94 (2014), World Pheasant Association

Galliformes Specialist Group and Affiliated Societies: Newsletters

WPA News (Summer 2014), number 94

Published by the World Pheasant Association


Across-Year Social Stability Shapes Network Structure In Wintering Migrant Sparrows, Daizaburo Shizuka, Alexis S. Chaine, Jennifer Anderson, Oscar Johnson, Inger Marie Laursen, Bruce E. Lyon Jul 2014

Across-Year Social Stability Shapes Network Structure In Wintering Migrant Sparrows, Daizaburo Shizuka, Alexis S. Chaine, Jennifer Anderson, Oscar Johnson, Inger Marie Laursen, Bruce E. Lyon

School of Biological Sciences: Faculty Publications

Migratory birds often form flocks on their wintering grounds, but important details of social structure such as the patterns of association between individuals are virtually unknown. We analysed networks of co-membership in short-term flocks for wintering golden-crowned sparrows (Zonotrichia atricapilla) across three years and discovered social complexity unsuspected for migratory songbirds. The population was consistently clustered into distinct social communities within a relatively small area (~ 7 ha). Birds returned to the same community across years, with mortality and recruitment leading to some degree of turnover in membership. These spatiotemporal patterns were explained by the combination of space …


Assessing Landscape Constraints On Species Abundance: Does The Neighborhood Limit Species Response To Local Habitat Conservation Programs?, Christopher F. Jorgensen, Larkin A. Powell, Jeffrey J. Lusk, Andrew A. Bishop, Joseph J. Fontaine Jun 2014

Assessing Landscape Constraints On Species Abundance: Does The Neighborhood Limit Species Response To Local Habitat Conservation Programs?, Christopher F. Jorgensen, Larkin A. Powell, Jeffrey J. Lusk, Andrew A. Bishop, Joseph J. Fontaine

Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications

Landscapes in agricultural systems continue to undergo significant change, and the loss of biodiversity is an ever-increasing threat. Although habitat restoration is beneficial, management actions do not always result in the desired outcome. Managers must understand why management actions fail; yet, past studies have focused on assessing habitat attributes at a single spatial scale, and often fail to consider the importance of ecological mechanisms that act across spatial scales. We located survey sites across southern Nebraska, USA and conducted point counts to estimate Ring-necked Pheasant abundance, an economically important species to the region, while simultaneously quantifying landscape effects using a …


In Memoriam [June 2014] Jun 2014

In Memoriam [June 2014]

Nebraska Bird Review

In memoriam: Alice Rushton, Gertrude Wood, and Mitzi Fox


Double-Crested Cormorant And American White Pelican Abundance At Sandhills Lakes During Fall Migration, Lauren R. Dinan, Joel G. Jorgensen Jun 2014

Double-Crested Cormorant And American White Pelican Abundance At Sandhills Lakes During Fall Migration, Lauren R. Dinan, Joel G. Jorgensen

Nebraska Bird Review

Double-crested Cormorants (DCCO, Phalacrocorax auritus) and American White Pelicans (AWPE, Pelecanus erythrorhynchos) are migratory piscivorous birds that breed in North America. Both species are abundant spring and fall migrants in Nebraska. DCCOs are also common, albeit local, breeders in northwestern Nebraska (Sharpe et al. 2001 ). DCCO and AWPE numbers have increased throughout their range in recent decades (U.S. Fish and Wildlife Service [USFWS] 2003, Sauer et al. 2013). Both species, but primarily DCCOs, have become increasingly controversial because of increased numbers and also because their principal food source is fish, a resource humans value. Concentrations of DCCOs, and to …