Open Access. Powered by Scholars. Published by Universities.®
- Discipline
- Keyword
-
- Grus americana (138)
- Grus canadensis (102)
- Whooping crane (94)
- Sandhill crane (90)
- Migration (44)
-
- Reintroduction (40)
- Florida (37)
- Whooping crane. (37)
- Grus canadensis tabida (31)
- Sandhill cranes (25)
- Cranes (24)
- Mortality (19)
- Greater sandhill crane (18)
- Nebraska (18)
- Platte River (18)
- Behavior (16)
- Grus canadensis pulla (16)
- Mississippi sandhill crane (15)
- Grus canadensis pratensis (13)
- Reproduction (13)
- Crane (12)
- Habitat use (12)
- Ultralight aircraft (11)
- Wisconsin (11)
- Endangered species (10)
- Habitat (10)
- Nesting (10)
- Whooping cranes (10)
- Costume-rearing (9)
- Management (9)
Articles 1 - 30 of 424
Full-Text Articles in Animal Sciences
Potential Effect Of The Proposed R-Project Transmission Line On The Aransas-Wood Buffalo Whooping Crane Population, Jeb A. Barzen, J. Michael Engels, Lisa H. Elliott, Douglas H. Johnson
Potential Effect Of The Proposed R-Project Transmission Line On The Aransas-Wood Buffalo Whooping Crane Population, Jeb A. Barzen, J. Michael Engels, Lisa H. Elliott, Douglas H. Johnson
Proceedings of the North American Crane Workshop
Whooping cranes (Grus americana) frequently encounter electrical transmission or distribution lines located throughout most of their range. We estimated the probability of at least 1 whooping crane being killed by colliding with a proposed transmission line (the R-project) planned to cross the primary whooping crane migration corridor in Nebraska. We also estimated the number of individuals that might be killed by the line. We used telemetry data provided by the U.S. Geological Survey and its partners, collected from 2009 to 2018, as well as published data, to estimate: 1) the probability that a migrating whooping crane would stop within the …
Thirteen-Year Status Of The Louisiana Nonmigratory Whooping Crane Reintroduction, Eva K. Szyszkoski, Sara E. Zimorski, Hillary L. Thompson
Thirteen-Year Status Of The Louisiana Nonmigratory Whooping Crane Reintroduction, Eva K. Szyszkoski, Sara E. Zimorski, Hillary L. Thompson
Proceedings of the North American Crane Workshop
During 2011–2023, 167 captive-reared whooping cranes (Grus americana) were released in the Louisiana Nonmigratory Population: 157 were costume-reared and 10 were parent-reared. There were 5 additional whooping cranes translocated to Louisiana from the Florida Nonmigratory Population. Approximately 68.7% of released cranes survived 1 year post-release and 51.3% survived 3 years following release. During 2011–2017, large cohorts of captive-reared cranes were released and the population size increased rapidly. The population grew more slowly during 2018–2023 when cohort sizes were smaller but there were more wild-hatched cranes that fledged. There were 114 mortalities, and of the 85 where remains were recovered, the …
Releases Of After Hatch Year And Adult Whooping Cranes In The Reintroduced Eastern Migratory Population, Stephanie M. Schmidt, Hillary L. Thompson
Releases Of After Hatch Year And Adult Whooping Cranes In The Reintroduced Eastern Migratory Population, Stephanie M. Schmidt, Hillary L. Thompson
Proceedings of the North American Crane Workshop
The reintroduced Eastern Migratory Population of whooping cranes (Grus americana) experiences low recruitment and high mortality. To support and supplement this population’s growth, ex-situ breeding and release programs prioritizing the release of juvenile whooping cranes (121.1 ± 2 days after hatch) are used. However, extenuating circumstances have resulted in the release of 4 after-hatch-year and 1 adult whooping crane between 2018 and 2022. Although the sample size is small, these unique cases are informative for future management and release, revealing lower survival 1 year after release (20%) than traditional release methods (parent-reared: 69.0%; costume-reared: 64.4%), and average post-release survival of …
Comparisons Of Habitat Use Between Parent-Reared And Costume-Reared Whooping Cranes In The Eastern Migratory Population, 2012–2023, Mary Anderson, Glenn H. Olsen, Susie Dunham, Hillary L. Thompson, Marianne M. Wellington
Comparisons Of Habitat Use Between Parent-Reared And Costume-Reared Whooping Cranes In The Eastern Migratory Population, 2012–2023, Mary Anderson, Glenn H. Olsen, Susie Dunham, Hillary L. Thompson, Marianne M. Wellington
Proceedings of the North American Crane Workshop
Different rearing and release methods have been used to introduce captive-raised whooping cranes (Grus americana) into eastern North America. One method, parent-rearing, coupled with direct release into the wild, offers several benefits over costume-rearing cranes coupled with guided migration by ultralight aircraft. However, little research has compared how these different rearing methods may influence post-release behavior of cranes in the wild. We compare habitat use between costume and parent-reared cranes. Habitat use is an expression of behavior, where cranes choose which habitats in which to spend their time. Using leg-band-mounted satellite transmitters, we documented habitat use patterns of costume-reared and …
Maximum Daily Dispersal Distance Of Wintering Whooping Cranes At Goose Pond Fish And Wildlife Area, Indiana, Alicia M. Ward, Hillary M. Thompson, Allisyn-Marie T. Y. Gillet, Amy J. Kearns, Andrew J. Caven
Maximum Daily Dispersal Distance Of Wintering Whooping Cranes At Goose Pond Fish And Wildlife Area, Indiana, Alicia M. Ward, Hillary M. Thompson, Allisyn-Marie T. Y. Gillet, Amy J. Kearns, Andrew J. Caven
Proceedings of the North American Crane Workshop
Whooping cranes (Grus americana) are an endangered species consisting of 4 populations, including the Eastern Migratory Population (EMP), a reintroduced experimental population that is not yet self-sustaining. The EMP breeds in Wisconsin and winters primarily in Indiana and Alabama. The International Crane Foundation and its partners release captive-reared chicks into the EMP annually to support the growth of the population. This population continues to face multiple threats throughout its flyway, including habitat loss and degradation, and collision mortalities. By analyzing global positioning system (GPS) data from whooping cranes at a primary wintering site, Goose Pond Fish and Wildlife Area (FWA, …
The Diets Of Wild And Reintroduced Whooping Cranes, Heather A. Neri, Glenn H. Olson, Eric C. Kindahl, Susan L. Carney
The Diets Of Wild And Reintroduced Whooping Cranes, Heather A. Neri, Glenn H. Olson, Eric C. Kindahl, Susan L. Carney
Proceedings of the North American Crane Workshop
We characterized the diets of the recently established Eastern Migratory Population (EMP) and the extant Aransas-Wood Buffalo population (AWBP). Starting in 2013, frozen proventriculus and ventriculus contents from previously collected dead whooping cranes from both populations were examined to identify dietary items and quantity. EMP whooping cranes (n = 29) consumed benthic macro-invertebrates, beetles, crabs/crayfish, vegetation, seeds, mollusks, and unidentifiable vertebrates. The diets of AWBP whooping cranes (n = 7) examined included all the same food items except benthic macro-invertebrates. Both populations also consumed a variety of non-food items, including plastic and metal. Our data suggests that the wild and …
Lead And Mercury Exposure In Eastern Whooping Cranes: Cause For Concern?, Barry K. Hartup, Anne E. Lacy, Hillary L. Thompson
Lead And Mercury Exposure In Eastern Whooping Cranes: Cause For Concern?, Barry K. Hartup, Anne E. Lacy, Hillary L. Thompson
Proceedings of the North American Crane Workshop
The dietary uptake of lead (Pb) and mercury (Hg) risks limiting population growth of reintroduced whooping cranes (Grus americana) in the Eastern Migratory Population (EMP). We evaluated these potentially toxic trace elements in blood and marginal covert feathers of wild-hatched juvenile and adult cranes sampled in the Wisconsin breeding range between 2016 and 2023. Samples were obtained at live capture events, and analyzed using inductively coupled plasma/mass spectrometry for Pb and Total Hg (THg). Blood Pb concentrations from adults were greater than those of juveniles, but feather Pb concentrations were similar between age classes. Blood and feather THg concentrations were …
Evidence Of Polygyny In A Greater Sandhill Crane, Gary L. Ivey, Chad W. August
Evidence Of Polygyny In A Greater Sandhill Crane, Gary L. Ivey, Chad W. August
Proceedings of the North American Crane Workshop
No abstract provided.
Sandhill Crane Lead Poisonings Linked To A Wetland Restoration, Andrew J. Caven, Joshua D. Wiese
Sandhill Crane Lead Poisonings Linked To A Wetland Restoration, Andrew J. Caven, Joshua D. Wiese
Proceedings of the North American Crane Workshop
Toward the end of the 2018 spring sandhill crane migration on the Platte River in Nebraska, we detected 7 dead cranes near a recently restored wetland within 200 m of the river’s main channel. Topographic recontouring of the soils had occurred in January of 2018 and the area was not yet revegetated. The area had formerly hosted an excavated pond where hunting occurred for many years prior to the 1991 ban on lead ammunition for waterfowl harvest. Two of the cranes with no physical signs of trauma were submitted for necropsy. The cause of death in both cases as lead …
Predators And Scavengers Of Eastern Migratory Whooping Crane Eggs, Hillary L. Thompson, Nicole M. Gordon
Predators And Scavengers Of Eastern Migratory Whooping Crane Eggs, Hillary L. Thompson, Nicole M. Gordon
Proceedings of the North American Crane Workshop
The Eastern Migratory Population of whooping cranes (Grus americana) is not yet self-sustaining, primarily due to low recruitment. We deployed 81 cameras on whooping crane nests in Wisconsin during 2019–2024 to determine the fate of each nest. We identified 7 instances of depredation of crane eggs and 10 of abandoned eggs that were later scavenged. Coyotes (Canis latrans, n = 3 nests) and raccoons (Procyon lotor, n = 2) were the primary predators of crane eggs. We documented common ravens (Corvus corax, n = 2 nests), American crows (Corvus brachyrhynchos, n = 2), a bald eagle (Haliaeetus leucocephalus, n = …
Correlates Of Sandhill Crane Off-Channel Roosting Behavior In The Platte Valley, Bethany L. Pstrom, Andrew J. Caven
Correlates Of Sandhill Crane Off-Channel Roosting Behavior In The Platte Valley, Bethany L. Pstrom, Andrew J. Caven
Proceedings of the North American Crane Workshop
During spring migration, more than 1 million sandhill cranes stage along the Platte River in central Nebraska. Appropriate river flows can support ideal depths for roosting and provide protection from terrestrial predators. Cranes and other waterbirds occasionally roost outside of the river channel or reduce diurnal activity therein but conditions under which this occurs remain poorly defined. Despite the ability to influence flows in this highly managed river system, many hydrological factors remain outside of managers’ control. We examine the proportion of sandhill cranes detected in nonriverine habitat during weekly aerial surveys from mid-February to mid-April from 2016 to 2023. …
Population Status Of Pacific Coast Canadian Sandhill Cranes Along The Lower Columbia River, Oregon And Washington, Usa, Mark A. Stern, Alex Chmielewski, Ginny A. Stern, Kenneth J. Popper, Jen L. Newlin, Mark A. Nebeker, Gary L. Ivey, Gary L. Ivey
Population Status Of Pacific Coast Canadian Sandhill Cranes Along The Lower Columbia River, Oregon And Washington, Usa, Mark A. Stern, Alex Chmielewski, Ginny A. Stern, Kenneth J. Popper, Jen L. Newlin, Mark A. Nebeker, Gary L. Ivey, Gary L. Ivey
Proceedings of the North American Crane Workshop
Pacific coast Canadian sandhill cranes (Grus canadensis rowani) breed in coastal regions of British Columbia and southeast Alaska and are considered a unique population within the Pacific Flyway. These cranes stage during fall migration along the Lower Columbia River at Sauvie Island Wildlife Area (SIWA), Oregon, Ridgefield National Wildlife Refuge (RNWR), Washington, and on adjacent lands. Peak numbers of cranes congregate here in late September through mid-October, with most of these cranes continuing south to winter in the Central Valley of California. During 2003–2024, we conducted single-day counts annually of cranes during peak fall migration as cranes flew into their …
Mississippi Sandhill Crane Conservation Update 2020–2023, Scott G, Hereford, Angela J. Dedrickson
Mississippi Sandhill Crane Conservation Update 2020–2023, Scott G, Hereford, Angela J. Dedrickson
Proceedings of the North American Crane Workshop
The Mississippi sandhill crane is an endangered non-migratory subspecies that primarily occurs on its namesake national wildlife refuge. To manage crane habitat on the Mississippi Sandhill Crane National Wildlife Refuge during 2020–2023, 8,885 ha were treated with prescribed burns, 648 ha of woody vegetation was removed, 234 ha of invasive plants were chemically treated, and 400 ha were mowed. There were 368 target predators removed, including coyotes and bobcats. Forty-six captive-reared juveniles were released. We detected an average of 64 nests per year, with a range of 63–69, the latter a record high. A total of 37 chicks fledged for …
Nocturnal Winter Roost Site Use By Whooping Cranes In The Aransas-Wood Buffalo Population, Matti R. Bradshaw, Carter G. Crouch, Katrina M. Fernald, Andrew J. Caven, Dorn M. Moore, Sundas Rehman
Nocturnal Winter Roost Site Use By Whooping Cranes In The Aransas-Wood Buffalo Population, Matti R. Bradshaw, Carter G. Crouch, Katrina M. Fernald, Andrew J. Caven, Dorn M. Moore, Sundas Rehman
Proceedings of the North American Crane Workshop
Evaluating site use and fidelity is vital to understanding roosting area needs for individual birds. We used data from wintering Aransas-Wood Buffalo population whooping cranes tracked with Platform Transmitting Terminals to identify roost sites in Texas. We analyzed 86 unique winters across 42 individuals and used a hierarchical clustering approach to group roost locations that were within 100 m of each other to identify unique roost sites by individual (n = 2,608). We found that on average, whooping cranes used 30.3 ± 1.71 SE roost sites per winter (range 8–70; 30 September and 2 May) and spent on average 4.4 …
Over-Summering Of Migratory Whooping Cranes On Their Wintering Grounds, Paityn C. Macko, Stephanie M. Schmidt, Carter G. Crouch, Arianna N. Barajas, Alicia M. Ward, Hillary L. Thompson, Matti R. Bradshaw, Elizabeth H. Smith
Over-Summering Of Migratory Whooping Cranes On Their Wintering Grounds, Paityn C. Macko, Stephanie M. Schmidt, Carter G. Crouch, Arianna N. Barajas, Alicia M. Ward, Hillary L. Thompson, Matti R. Bradshaw, Elizabeth H. Smith
Proceedings of the North American Crane Workshop
Over-summering of migratory bird populations on wintering grounds may occur when individuals forgo migration and remain in non-breeding or wintering habitats. We summarized all reported instances of migratory whooping cranes (Grus americana) over-summering on the wintering grounds during 1891–2024. We report 9 individuals over-summering from the Eastern Migratory Population (EMP), 4 reports from Texas during 1891–1941, and between 1–4 individuals over-summering across 23 summers from the Aransas-Wood Buffalo Population (AWBP) post-1941. Although there were many instances of over-summering without clear proximate causes, some documented causes or contributing factors across both populations include injury, disease, death or injury of a mate, …
Habitat Use By Sandhill Cranes Wintering In The Agricultural Landscape Of The Sacramento–San Joaquin River Delta Of California, Gary L. Ivey, Bruce D. Dugger, Caroline P. Herziger, Michael L. Casazza, Joseph P. Fleskes
Habitat Use By Sandhill Cranes Wintering In The Agricultural Landscape Of The Sacramento–San Joaquin River Delta Of California, Gary L. Ivey, Bruce D. Dugger, Caroline P. Herziger, Michael L. Casazza, Joseph P. Fleskes
Proceedings of the North American Crane Workshop
The Sacramento–San Joaquin Delta region of California is an important wintering region for sympatric greater (Grus canadensis tabida) and lesser (G. c. canadensis) sandhill cranes. Basic information about sandhill crane use of habitats in their winter landscape is needed to design a biologically driven conservation strategy. We monitored a sample of radio-tagged birds of each subspecies for 2 winters and conducted foraging counts to document their habitat use. Cranes used the major crops and habitat types that were available in the landscapes surrounding their roost sites and focused most of their foraging in grain crops. We examined habitat selection surrounding …
Whooping Crane Nesting Behavior, Parental Care, And Ecology At Wood Buffalo National Park, Andrew J. Caven, Michael J. Forsberg
Whooping Crane Nesting Behavior, Parental Care, And Ecology At Wood Buffalo National Park, Andrew J. Caven, Michael J. Forsberg
Proceedings of the North American Crane Workshop
We studied Whooping crane (Grus americana) nesting behavior and movement patterns at Wood Buffalo National Park using an instantaneous scan sampling approach. We also photo-documented important behavioral and ecological observations. Data were collected from 2 to 9 June 2023 from before 3:00 to after 22:00 hours. We completed 88 hours of observation and documented nest swapping about every 3.2 hours. The female incubated/brooded 3.3-10.9% more than the male, and the probability of incubation/brooding declined by 49% after the second chick began pipping and by 99% after both chicks had hatched. The eldest chick was successfully provisioned 16 hours and 33 …
Inland Habitat Selection Model For Wintering Whooping Cranes, Karen Tyrell, Kristin Brightwell, Matthew Crane, Wade Harrell, Rosa Palmer, Aaron T. Pearse, Ted Owen
Inland Habitat Selection Model For Wintering Whooping Cranes, Karen Tyrell, Kristin Brightwell, Matthew Crane, Wade Harrell, Rosa Palmer, Aaron T. Pearse, Ted Owen
Proceedings of the North American Crane Workshop
Inland habitat use by wintering Aransas-Wood Buffalo whooping cranes (Grus americana) is expected to increase given projected population growth and observations of some whooping cranes using inland winter habitat in addition to coastal marshes. We developed resource utilization functions using ‘random forests’ to model whooping crane use as a function of environmental covariates considered important for whooping crane use. Covariates associated with distance to cropland, distance to development, and wetness or standing water were the most influential in model prediction. The model estimated that the 50% predicted use contour encompassed 34,925 hectares (ha) and the 95% predicted use contour encompassed …
Mortality Of Fledged Whooping Cranes In The Aransas-Wood Buffalo Population, Kristin Brightwell, Matt Rabbe, Aaron T. Pearse, Ben Bainbridge, Karen Tyrell, Clayton Derby
Mortality Of Fledged Whooping Cranes In The Aransas-Wood Buffalo Population, Kristin Brightwell, Matt Rabbe, Aaron T. Pearse, Ben Bainbridge, Karen Tyrell, Clayton Derby
Proceedings of the North American Crane Workshop
Maintaining accurate mortality records for endangered species is important for guiding management and conservation actions. Mortalities of whooping cranes (Grus americana) in the Aransas-Wood Buffalo Population (AWBP) are documented in published records from 1950 through 2010. This paper documents publicly available records of known mortalities from 2011 through 2023, and updates historic records from 1950 to 2010. Public sightings and telemetry carcass records were restricted to fledged whooping cranes from the AWBP and stratified by confirmed, suspected, and unknown causes across the annual range (i.e., summer, migration, and winter). This mortality update provides more certainty associated with available carcass data …
Differential Habitat Use Of Wintering Whooping Cranes Throughout The Range Of The Eastern Migratory Population, Hillary L. Thompson, Anne E. Lacy, Robert F. Baldwin, Patrick G. R. Jodice
Differential Habitat Use Of Wintering Whooping Cranes Throughout The Range Of The Eastern Migratory Population, Hillary L. Thompson, Anne E. Lacy, Robert F. Baldwin, Patrick G. R. Jodice
Proceedings of the North American Crane Workshop
In 2001, a reintroduced population of whooping cranes (Grus americana), the Eastern Migratory Population (EMP), was established in the eastern United States. There has been no assessment of habitat use of the EMP across the current winter distribution. During 2 winters, we used radio-telemetry to track groups of cranes each for 1 day. We grouped sites into 3 regions, based on natural clustering: north (Illinois, Indiana, Kentucky), central (Tennessee, Alabama), and south (Georgia, Florida, Louisiana). Home ranges decreased in size from north to south (4.9 ± 2.8, 3.1 ± 1.0, and 2.3 ± 0.5 km2, respectively). In the north and …
Comparisons Of Migration Patterns Between Parent-Reared And Costume-Reared Whooping Cranes In The Eastern Migratory Population, 2012–2023, Mary Anderson, Glenn H. Olsen, Susie Dunham, Hillary L. Thompson, Marianne M. Wellington
Comparisons Of Migration Patterns Between Parent-Reared And Costume-Reared Whooping Cranes In The Eastern Migratory Population, 2012–2023, Mary Anderson, Glenn H. Olsen, Susie Dunham, Hillary L. Thompson, Marianne M. Wellington
Proceedings of the North American Crane Workshop
Whooping cranes (Grus americana) have been raised and released into the Eastern Migratory Population (EMP) since 2001. Cranes either were costume-reared and learned their migration route by following an ultralight aircraft, were costume-reared and released in fall near adult cranes (known as direct autumn release), or were parent-reared by captive adult whooping crane pairs and released in the fall near adult whooping cranes. Compared to costume-rearing, parent-rearing encourages conspecific learning prior to release, but needs further research to understand how it may influence post-release behaviors including migration. This study compared the migratory timing and length of parent-reared whooping cranes and …
Temporal Patterns Of Sandhill Crane Use Of The Pecos River Valley, Chaves County, New Mexico, James B. Montgomery Jr.
Temporal Patterns Of Sandhill Crane Use Of The Pecos River Valley, Chaves County, New Mexico, James B. Montgomery Jr.
Proceedings of the North American Crane Workshop
The Pecos River Valley is an important stopover area for both migrating and wintering sandhill cranes (Grus canadensis) in southeastern New Mexico. The combination of shallow impoundments and a playa lake at Bitter Lake National Wildlife Refuge, off-refuge shallow ponds and riverine wetlands, and approximately 20,000 ha of nearby irrigated farmlands in Chaves County provided roosting and foraging areas used by the cranes. Once per week sandhill cranes were counted when departing their roosts during September through April 2005–2024. The fall migration during October and November peaked at 24,431 ± 204 (SE). During this peak period, cranes divided foraging between …
Movement Of Eastern Migratory Whooping Cranes Outside The Nonessential Experimental Population Range, 2002–2024, Nicole M. Gordon, Eleanor A. Laack, Hannah R. Macinnes, Alicia M. Ward, Hillary L. Thompson
Movement Of Eastern Migratory Whooping Cranes Outside The Nonessential Experimental Population Range, 2002–2024, Nicole M. Gordon, Eleanor A. Laack, Hannah R. Macinnes, Alicia M. Ward, Hillary L. Thompson
Proceedings of the North American Crane Workshop
Whooping cranes (Grus americana) are listed as an endangered species under the Endangered Species Act (ESA), with 1 historic migratory population and multiple reintroduced populations. The reintroduced populations, including the Eastern Migratory Population (EMP), are considered nonessential experimental populations (NEP) under section 10j of the ESA. Within the boundaries of the NEP range, whooping cranes are treated with the protection of a threatened species on federal lands but are treated as a species under consideration for listing on private lands. However, if an individual exits the NEP range, they are treated as federally endangered and have the full protections of …
Proceedings Of The Sixteenth North American Crane Workshop: Abstracts, Megan E. Brown, Barry K. Hartup, Jane E. Austin
Proceedings Of The Sixteenth North American Crane Workshop: Abstracts, Megan E. Brown, Barry K. Hartup, Jane E. Austin
Proceedings of the North American Crane Workshop
Following is a list of all abstracts of presentations given at the 16th North American Crane Workshop (2023), some of which were not published in these Proceedings.
Proceedings Of The Sixteenth North American Crane Workshop, 23–26 October 2023, Baraboo, Wisconsin, Cover And Frontmatter, Megan E. Brown, Barry K. Hartup, Jane E. Austin
Proceedings Of The Sixteenth North American Crane Workshop, 23–26 October 2023, Baraboo, Wisconsin, Cover And Frontmatter, Megan E. Brown, Barry K. Hartup, Jane E. Austin
Proceedings of the North American Crane Workshop
Cover and frontmatter for the Proceedings of the Sixteenth North American Crane Workshop held October 23–26, 2023 in Baraboo, Wisconsin. Includes the preface by the editors, in memoria for M. Cathy Nowak (1955–2023) and Geroge F. Gee (1937–2022), and the contents.
Mississippi Sandhill Crane Conservation Update 2017–2019, Scott G. Hereford, Angela J. Dedrickson
Mississippi Sandhill Crane Conservation Update 2017–2019, Scott G. Hereford, Angela J. Dedrickson
Proceedings of the North American Crane Workshop
To manage crane habitat on the Mississippi Sandhill Crane National Wildlife Refuge during 2017-2019, 5,822 ha were treated with prescribed burns, 648 ha of woody vegetation were removed, 97 ha of invasive plants were chemically treated, and 1.2 ha of crops were planted. Mississippi sandhill crane (Grus canadensis pulla) use responded to habitat treatment; 348 of 349 VHF radio locations were in treated areas. There were 316 target predators removed. Eighteen captive-reared juveniles were acclimated and released. We detected an average of 38 nests per year, including a record 40 nests in 2019. Fifteen chicks fledged in 2019, …
Twenty-Year Status Of The Eastern Migratory Whooping Crane Reintroduction, Hillary L. Thompson, Nicole M. Gordon, Darby P. Bolt, Jadine R. Lee, Eva K. Szyszkoski
Twenty-Year Status Of The Eastern Migratory Whooping Crane Reintroduction, Hillary L. Thompson, Nicole M. Gordon, Darby P. Bolt, Jadine R. Lee, Eva K. Szyszkoski
Proceedings of the North American Crane Workshop
Since the 10-year status update in 2011, the first parent-reared whooping cranes (Grus americana) were released in the Eastern Migratory Population, the ultralight program (UL) ended, and cranes were released at new sites in eastern Wisconsin. During 2011-2020, 117 captive-reared whooping cranes were released; 75 costume-reared (35 in UL and 40 in the Direct Autumn Release program) and 42 parent-reared. There were no significant differences in 1- or 3-year survival rates based on rearing technique or release site. The population size remained at about 100 cranes during 2010-2018 but then decreased during 2018-2020 due to a reduced number …
Drivers Of Annual Fledging In The Mississippi Sandhill Crane Population 1991–2018, Henry W. Woolley, Scott G. Hereford, Jerome J. Howard
Drivers Of Annual Fledging In The Mississippi Sandhill Crane Population 1991–2018, Henry W. Woolley, Scott G. Hereford, Jerome J. Howard
Proceedings of the North American Crane Workshop
We studied trends in nesting, number of chicks fledged annually, and their environmental and biotic drivers in the wild population of Mississippi sandhill cranes (Grus canadensis pulla) on Mississippi Sandhill Crane National Wildlife Refuge during 1991-2018. Population size, number of nests, and number of chicks fledged annually increased slowly but significantly over the course of the study. Increases in population size were related to both number of wild-reared chicks fledged annually and number of captive-reared chicks released each year, but wild-reared chicks had significantly higher survivorship than captive-reared chicks. Hurricanes transiently raised mortality rates but only Hurricane Katrina …
The Impact Of Marking On Cranes: An Issue Paper, Anne E. Lacy, Barry K. Hartup, David A. Brandt
The Impact Of Marking On Cranes: An Issue Paper, Anne E. Lacy, Barry K. Hartup, David A. Brandt
Proceedings of the North American Crane Workshop
As crane researchers and conservationists, our overarching objective is to learn and gather information about our study subjects while doing as little harm as possible. New technologies may be emerging too rapidly for researchers to assess the effectiveness or potential adverse effects of the devices, despite the ease and increasing accuracy of the information they provide. Researchers need to be able to gather information to answer various questions in a way that balances ethics and expense. With marking of cranes as a focal point, we discuss issues surrounding crane research based on various techniques, some health issues that are a …
Black Fly Survey Of A Whooping Crane Reintroduction Area In Eastern Wisconsin, Richard P. Urbanek, Peter H. Adler
Black Fly Survey Of A Whooping Crane Reintroduction Area In Eastern Wisconsin, Richard P. Urbanek, Peter H. Adler
Proceedings of the North American Crane Workshop
Nest desertion due to harassment by black flies (Simulium annulus and S. johannseni) during incubation has been a major factor inhibiting success of the reintroduced Eastern Migratory Population of whooping cranes (Grus americana). To avoid this problem, which was prevalent in the core reintroduction area in central Wisconsin, the Whooping Crane Eastern Partnership changed the primary reintroduction area to eastern Wisconsin in 2011. However, a 2010 assessment of black flies in that area had concentrated predominantly on the southern portion of the new area. In 2017-2018, we collected the first samples of black flies in …