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Articles 1 - 30 of 58
Full-Text Articles in Ecology and Evolutionary Biology
Effects Of Experimental Malaria Infection On Migration Of Yellow-Rumped Warblers (Setophaga Coronata), Rebecca J. Howe
Effects Of Experimental Malaria Infection On Migration Of Yellow-Rumped Warblers (Setophaga Coronata), Rebecca J. Howe
Electronic Thesis and Dissertation Repository
The potential of migratory animals to spread infectious diseases depends on how infection affects movement. If infection delays or slows the speed of travel, transmission to uninfected individuals may be reduced. Whether and how malaria (Plasmodium spp.) affects bird migration has received little experimental research. I captured 40 actively-migrating Yellow-rumped Warblers (Setophaga coronata) at a migration stopover site and held them in captivity. I inoculated 25 with P. cathemerium while 15 received sham inoculations. After 12 days the birds were released. Six P. cathemerium-inoculated birds (24%) developed P. cathemerium infections after inoculation. I radio-tagged all birds, …
Effects Of Release Techniques On Parent-Reared Whooping Cranes In The Eastern Migratory Population, Hillary L. Thompson, M. Susanna Glass, Marianne M. Wellington, Kim H. Boardman, Glenn H. Olsen
Effects Of Release Techniques On Parent-Reared Whooping Cranes In The Eastern Migratory Population, Hillary L. Thompson, M. Susanna Glass, Marianne M. Wellington, Kim H. Boardman, Glenn H. Olsen
Proceedings of the North American Crane Workshop
Reintroduction of an Eastern Migratory Population (EMP) of whooping cranes (Grus americana) in the United States by release of captive-reared individuals began in 2001. As of 2020, the EMP has approximately 21 breeding pairs and has had limited recruitment of wild-hatched individuals, thus captive-reared juveniles continue to be released into breeding areas in Wisconsin to maintain the population. We investigated the effects of release techniques on survival, behavior, site fidelity, and conspecific associations of 42 captive-parent-reared whooping cranes released during 2013-2019 into the EMP. Individuals were monitored intensively post-release, then as a part of a long-term monitoring program, …
Whooping Crane Stay Length In Relation To Stopover Site Characteristics, Andrew J. Caven, Aaron T. Pearse, David A. Brandt, Mary J. Harner, Greg D. Wright, David M. Baasch, Emma M. Brinley Buckley, Kristine L. Metzger, Matthew R. Rabbe,, Anne E. Lacy
Whooping Crane Stay Length In Relation To Stopover Site Characteristics, Andrew J. Caven, Aaron T. Pearse, David A. Brandt, Mary J. Harner, Greg D. Wright, David M. Baasch, Emma M. Brinley Buckley, Kristine L. Metzger, Matthew R. Rabbe,, Anne E. Lacy
Proceedings of the North American Crane Workshop
Whooping crane (Grus americana) migratory stopovers can vary in length from hours to more than a month. Stopover sites provide food resources and safety essential for the completion of migration. Factors such as weather, climate, demographics of migrating groups, and physiological condition of migrants influence migratory movements of cranes (Gruidae) to varying degrees. However, little research has examined the relationship between habitat characteristics and stopover stay length in cranes. Site quality may relate to stay length with longer stays that allow individuals to improve body condition, or with shorter stays because of increased foraging efficiency. We examined this …
Documentation Of Atlantic Tarpon (Megalops Atlanticus) Space Use And Move Persistence In The Northern Gulf Of Mexico Facilitated By Angler Advocates, J. Marcus Drymon, Matthew B. Jargowsky, Michael A. Dance, Mitchell Lovell, Crystal L. Hightower, Amanda E. Jefferson, Andrea M. Kroetz, Sean P. Powers
Documentation Of Atlantic Tarpon (Megalops Atlanticus) Space Use And Move Persistence In The Northern Gulf Of Mexico Facilitated By Angler Advocates, J. Marcus Drymon, Matthew B. Jargowsky, Michael A. Dance, Mitchell Lovell, Crystal L. Hightower, Amanda E. Jefferson, Andrea M. Kroetz, Sean P. Powers
University Faculty and Staff Publications
Atlantic tarpon (Megalops atlanticus, hereafter tarpon) are facing a multitude of stressors and are considered Vulnerable by the IUCN; however, significant gaps remain in our understanding of tarpon space use and movement. From 2018 to 2019, citizen scientists facilitated tagging of 23 tarpon with SPOT tags to examine space use and movement across the northern Gulf of Mexico. Movement-based kernel densities were used to estimate simplified biased random bridge-based utilization distributions and a joint move persistence model was used to estimate a behavioral index for each fish. Tarpon showed consistent east–west movement from the Alabama/Florida border to Louisiana, and utilization …
Roosting Habitat Use By Sandhill Cranes And Waterfowl On The North And South Platte Rivers In Nebraska, Dana Varner, Aaron T. Pearse, Andy Bishop, Jonas I. Davis, John C. Denton, Roger C. Grosse, Heather M. Johnson, U.S. Fish And Wildlife Service, Soldotna, Ak, Kirk D. Schroeder, Robert E. Spangler, Mark Vrtiska, Angelina E. Wright
Roosting Habitat Use By Sandhill Cranes And Waterfowl On The North And South Platte Rivers In Nebraska, Dana Varner, Aaron T. Pearse, Andy Bishop, Jonas I. Davis, John C. Denton, Roger C. Grosse, Heather M. Johnson, U.S. Fish And Wildlife Service, Soldotna, Ak, Kirk D. Schroeder, Robert E. Spangler, Mark Vrtiska, Angelina E. Wright
USGS Northern Prairie Wildlife Research Center
Migration ecology and habitat use of spring migrating birds using the Central Platte River is a well-explored topic, yet less is known about use of the North and South Platte rivers (NSPR) in western Nebraska. The efficiency and effectiveness of conservation efforts in the NSPR could be greatly improved with access to information about where and when birds roost and landscape prioritization tools. We used aerial surveys to determine population distribution and migration phenology of sandhill cranes Antigone canadensis, Canada geese Branta canadensis, and ducks using the NSPR for roosting during the mid-February to mid-April spring migration. We used these …
Fall Migration And Winter Habitat Use Of Northern Saw-Whet Owls (Aegolius Acadicus) In The Ozark Highlands, Mitchell L. Pruitt
Fall Migration And Winter Habitat Use Of Northern Saw-Whet Owls (Aegolius Acadicus) In The Ozark Highlands, Mitchell L. Pruitt
Graduate Theses and Dissertations
Studying movement ecology is important not only in understanding the distribution of a species, but in understanding the magnitude of migration through certain regions, as well as explaining regional differences in demographics. The Northern Saw-whet Owl (Aegolius acadicus) is a small, migratory forest owl found throughout much of North America. Despite being captured widely during fall migration, the species’ movement ecology is poorly understood. Exploratory studies outside the saw-whet owl’s normal range have successfully captured the species during fall migration. In the Ozark Highlands ecoregion of the central United States, their status has been considered vagrant during fall and winter. …
Hitchhiker's Guide To Migration: Effects Of Experimental Parasitic Infection And Other Immune Challenges On Migratory Traits Of Sparrows, Tosha R. Kelly
Hitchhiker's Guide To Migration: Effects Of Experimental Parasitic Infection And Other Immune Challenges On Migratory Traits Of Sparrows, Tosha R. Kelly
Electronic Thesis and Dissertation Repository
Seasonal migration exposes animals to a variety of habitats and parasites, and if infected migratory birds migrate successfully there is great potential for birds to transport infectious diseases long distances. Our current understanding of whether birds contribute to the spread of disease relies upon observational field studies that are limited in their ability to discern cause from effect. Using captive and field-based experiments for my doctoral research, I answered three research questions: (1) are nocturnal migratory restlessness (Zugunruhe) and body condition affected by mounting an acute phase immune response during migration; (2) what are the impacts of parasitic …
American Woodcock Migration Ecology At An Important Stopover, Cape May, New Jersey, Brian B. Allen
American Woodcock Migration Ecology At An Important Stopover, Cape May, New Jersey, Brian B. Allen
Electronic Theses and Dissertations
Migration poses risks and energetic demands to individuals that may be greater than those experienced during non-migratory periods. Most migratory birds require stopover sites to rest and recuperate energy spent during migratory flights, and stopover locations can alleviate risks and provide supplemental energy en route to the animal’s end destination. An individual’s stopover duration is contingent first on energy acquisition that is constrained by resource availability, and secondarily on environmental conditions such as weather that may facilitate or constrain continued migration. From 2010 to 2013 I conducted a radio-telemetry study of a short-distance migrant, the American Woodcock (Scolopax minor), on …
Behavioral Ecology Of Landbird Migrants In A Complex And Changing Flyway System: The Gulf Of Maine, Adrienne J. Leppold
Behavioral Ecology Of Landbird Migrants In A Complex And Changing Flyway System: The Gulf Of Maine, Adrienne J. Leppold
Electronic Theses and Dissertations
In and around the Gulf of Maine, over 300 species of birds have been documented during migration, and tens of millions of songbirds may pass through the region on a single autumn night. Shorelines are widely documented as major migration corridors. There is ample evidence that coastal areas concentrate migrants and many species make overwater movements to and from breeding and wintering grounds. Data collected from radar, banding, and ceilometry studies in the northeast have provided us with evidence that birds migrate along the coast and make overwater movements across the Gulf of Maine and Bay of Fundy during both …
Stopover Ecology Of Ruby-Throated Hummingbirds (Archilochus Colubris) During Autumn Migration, Theodore Joseph Zenzal Jr
Stopover Ecology Of Ruby-Throated Hummingbirds (Archilochus Colubris) During Autumn Migration, Theodore Joseph Zenzal Jr
Dissertations
The Ruby-throated Hummingbird (Archilochus colubris) is one of the smallest Nearctic-Neotropical migrants and the only species of hummingbird that breeds in Eastern North America, yet few studies have investigated the biology of Ruby-throated Hummingbirds when they stopover during migration. Given their small size, high metabolism, aggression, and specialized diet, hummingbirds may represent a migrant that operates on the physiological edge. Therefore it is important to understand the factors that influence their stopover as well as the decision to resume migration. Towards this end, Ruby-throated Hummingbirds were captured during autumn migration along the northern coast of the Gulf of Mexico to …
Winter And Migratory Habitat Use Of Six Eastern Greater Sandhill Cranes, Hillary L. Thompson, Anne E. Lacy
Winter And Migratory Habitat Use Of Six Eastern Greater Sandhill Cranes, Hillary L. Thompson, Anne E. Lacy
Proceedings of the North American Crane Workshop
To better understand non-breeding ecology of sandhill cranes (Grus canadensis tabida), we harnessed 6 satellite GPS transmitters to adult cranes from 1 central Wisconsin breeding area. Using location data from these transmitters, we investigated non-breeding movements, including the routes and timing of migration. By combining satellite GPS data with a national land cover dataset, we also described habitat use on stopovers and wintering areas. Sandhill cranes tended to use larger home ranges on long stopovers (>3 days) than on short stopovers (3 days or less). The durations of northward migrations were longer and had more stopovers than …
A Review Of Fall Sandhill Crane Migration Through Indiana, Allisyn-Marie T. Y. Gillet
A Review Of Fall Sandhill Crane Migration Through Indiana, Allisyn-Marie T. Y. Gillet
Proceedings of the North American Crane Workshop
The Indiana Division of Fish and Wildlife conducts surveys from October to December to collect long-term data on greater sandhill cranes (Grus canadensis tabida). Results from these censuses contribute to a fall index of the Eastern Population, which informs wildlife management decisions and research priorities. Recent findings from the annual U. S. Fish and Wildlife Service Fall Sandhill Crane Migration Survey demonstrate a decline in the number of cranes observed at fall staging areas throughout Indiana since 1979. However, nationwide data exhibit a trend of population increase. I provide evidence to show that the apparent decline in the …
Explaining Migratory Behaviors Using Optimal Migration Theory, Jennifer D. Mccabe
Explaining Migratory Behaviors Using Optimal Migration Theory, Jennifer D. Mccabe
Electronic Theses and Dissertations
Bird migration is the regular seasonal movements between breeding and nonbreeding grounds. In general, birds that breed in the Northern Hemisphere tend to migrate northward in the spring to take advantage of increasing insect populations and lower predation pressures and fly south when food availability and weather conditions decline. Embarking on a journey that can stretch a thousand miles round trip is a dangerous and arduous undertaking. While en route migrants must stop and feed to replenish their depleted energy reserves, often in unfamiliar locations with unknown predation pressures. They also must react to weather conditions during flight and while …
Diel Vertical Migration Of An Invasive Calanoid Copepod, Eurytemora Affinis, In Little Sturgeon Bay, Wisconsin, Alexandra N. Poli
Diel Vertical Migration Of An Invasive Calanoid Copepod, Eurytemora Affinis, In Little Sturgeon Bay, Wisconsin, Alexandra N. Poli
Lawrence University Honors Projects
Eurytemora affinis, a calanoid copepod, is known to be a versatile, prolific invader of freshwater ecosystems across the globe. It has recently been documented in the Laurentian Great Lakes, including in Little Sturgeon Bay, an embayment of Lake Michigan. One survival mechanism that could make E. affinis a successful invader is diel vertical migration (DVM), a behavior in which animals move to different lakes depths at different times of day in order to avoid predation. Much is known about DVM of E. affinis, but primarily from studies in marine and brackish systems. Our goal was to investigate how …
Wintering Ecology Of Adult North American Ospreys, Brian E. Washburn, Charles J. Henny, Mark S. Martell, Richard O. Bierregaard, Brian S. Dorr, Thomas J. Olexa
Wintering Ecology Of Adult North American Ospreys, Brian E. Washburn, Charles J. Henny, Mark S. Martell, Richard O. Bierregaard, Brian S. Dorr, Thomas J. Olexa
Brian S Dorr
North American Ospreys (Pandion haliaetus) typically migrate long distances to their wintering grounds in the tropics. Beyond the general distribution of their wintering range (i.e., the Caribbean, South America, and Central America), very little is known about the wintering ecology of these birds. We used satellite telemetry to determine the duration of wintering period, to examine the characteristics of wintering areas used by Ospreys, and to quantify space use and activity patterns of wintering Ospreys. Adult Ospreys migrated to wintering sites and exhibited high wintering site fidelity among years. Overall, Ospreys wintered on river systems (50.6%) more than on lakes …
Northern Saw-Whet Owls: A Descriptive Look At Their Anatomy, Behavior, And Migration, Brandon M. Ray
Northern Saw-Whet Owls: A Descriptive Look At Their Anatomy, Behavior, And Migration, Brandon M. Ray
Senior Honors Theses
The Northern Saw-whet Owl (Aegolius acadicus) is a small species of migratory owl native to North America. Through an analysis of research conducted at Liberty University’s Camp Hydaway in the Piedmont of Virginia as well as comparison studies at owl netting stations in the mountains and the coastal plain, it was shown that the Northern Saw-whet migrates along consistent routes southward while the timing and frequency of the migration varies by several days based on sex, age, owl population fluctuations, weather, and the owls’ physical health. Several years’ worth of owl capture data were compiled from stations across …
Stopover Decisions Of Migratory Shorebirds: An Assessment Of Habitat Use, Food Availability, Behavior And Phenology, Ryan Stutzman
Stopover Decisions Of Migratory Shorebirds: An Assessment Of Habitat Use, Food Availability, Behavior And Phenology, Ryan Stutzman
School of Natural Resources: Dissertations, Theses, and Student Research
Habitat loss and alteration from land use change, species invasion, and more recently, climate change has reduced biodiversity and ecosystem function worldwide. Habitat decisions have important implications to individual fitness as well as population dynamics and community structure. Resource limitation, predation, competition, and unfavorable abiotic conditions all have the potential to influence survival and future reproductive potential. Understanding how changes to ecosystem structure and function impact species and populations of conservation concern is essential for conservation delivery to be effective. Similar to many migratory species, shorebird populations are declining worldwide and declines may be related to the loss of important …
Patterns Of Transience, Sex Bias, And Body Mass In Open-Habitat Rodent Populations, Stephen Edward Rice
Patterns Of Transience, Sex Bias, And Body Mass In Open-Habitat Rodent Populations, Stephen Edward Rice
Biological Sciences Theses & Dissertations
Rodents are assumed to live their lives in circumscribed (natal) areas with males being more prone to disperse than females and juveniles more prone to disperse than adults. To test these assumptions we examined the initial captures of geographic populations of hispid cotton rat, meadow vole, prairie vole, and marsh rice rat obtained through capture-mark-recapture methods. Capture records were obtained from Kansas and Illinois from long-term studies, and through live-trapping in Chesapeake, Virginia. I evaluated proportions of residents and transients, adults and juveniles, and males and females for significant differences among seasons, years, and geographic locations. The overall body masses …
Whooping Crane Migrational Habitat Use Of The Platte River, Nebraska, 2001-2006, Shay Howlin, Clayton Derby, Dale Strickland
Whooping Crane Migrational Habitat Use Of The Platte River, Nebraska, 2001-2006, Shay Howlin, Clayton Derby, Dale Strickland
Proceedings of the North American Crane Workshop
The Platte River Endangered Species Partnership monitored whooping crane (Grus americana) habitat use along the Platte River between Chapman and Lexington, Nebraska during 11 migration seasons from 2001 to 2006. Daily aerial surveys took place in the morning from 21 March to 29 April in the spring and from 9 October to 10 November in the fall. Decoy detection trials were conducted during each of the 11 survey seasons to calculate actual sample inclusion probabilities for crane groups detected during monitoring flights. The detectability model found significant differences in detectability among strata (upland or channel), contractor, and altitude …
Development Of The Whooping Crane Tracking Project Geographic Information System, Martha Tacha, Andy Bishop, Justin Brei
Development Of The Whooping Crane Tracking Project Geographic Information System, Martha Tacha, Andy Bishop, Justin Brei
Proceedings of the North American Crane Workshop
The highest losses in the Aransas-Wood Buffalo whooping crane population occur during migration. Conservation and recovery of the endangered whooping crane requires understanding of migration patterns to identify important stopover areas and potential sources of mortality or disturbance. We converted the Cooperative Whooping Crane Tracking Project database, containing more than 3 decades of data on whooping crane sightings, to a geographic information system (GIS) to allow coarse scale spatial analyses of whooping crane migration patterns in the United States portion of the Central Flyway. At this writing, the geodatabase contains point data for 1,981 confirmed whooping crane sightings through the …
Migration Of Northern Yellowstone Elk: Implications Of Spatial Structuring, P. J. White, Kelly M. Proffitt, L. David Mech, Shaney B. Evans, Julie A. Cunningham, Kenneth L. Hamlin
Migration Of Northern Yellowstone Elk: Implications Of Spatial Structuring, P. J. White, Kelly M. Proffitt, L. David Mech, Shaney B. Evans, Julie A. Cunningham, Kenneth L. Hamlin
USGS Northern Prairie Wildlife Research Center
Migration can enhance survival and recruitment of mammals by increasing access to higher-quality forage or reducing predation risk, or both. We used telemetry locations collected from 140 adult female elk during 2000– 2003 and 2007–2008 to identify factors influencing the migration of northern Yellowstone elk. Elk wintered in 2 semidistinct herd segments and migrated 10–140 km to at least 12 summer areas in Yellowstone National Park (YNP) and nearby areas of Montana. Spring migrations were delayed after winters with increased snow pack, with earlier migration in years with earlier vegetation green-up. Elk wintering at lower elevations outside YNP migrated an …
Population Status And Geographic Distribution Of Greater Sandhill Cranes In The Mid-Continent Population, Gary L. Krapu, David A. Brandt
Population Status And Geographic Distribution Of Greater Sandhill Cranes In The Mid-Continent Population, Gary L. Krapu, David A. Brandt
Proceedings of the North American Crane Workshop
Number and geographic distribution of greater sandhill cranes (Grus canadensis tabida) in the mid-continent population (MCP) of sandhill cranes were evaluated. G. c. tabida comprised 7 of 133 (5.3%) individuals of 3 subspecies which projects to 31,579 ± 11,661 (SE) individuals in an estimated spring MCP of 600,000 cranes. From a platform transmitting terminal (PTT)-marked sample representative of the geographic distribution of G. c. tabida, 10 of 13 (77%) settled during the breeding season in east-central Canada/Minnesota, including 4 in northwestern Minnesota, 4 in Manitoba (2 at sites near the Minnesota border), and 2 in Ontario. Three …
Sandhill Crane Migration Chronology And Behavior In Northwestern Texas, Carroll D. Littlefield
Sandhill Crane Migration Chronology And Behavior In Northwestern Texas, Carroll D. Littlefield
Proceedings of the North American Crane Workshop
Migrant lesser sandhill cranes (Grus canadensis canadensis) were monitored during 1990-2000 in northwestern Texas as flocks were arriving in autumn and departing in spring; cranes were counted as they passed over an observation point 23 km north of Sudan, Lamb County, Texas. Mean flock size was 34.5 (SD ± 32.6) in autumn and 58.2 (SD ± 45.0) in spring. Most autumn migrants (69.6%) passed in the afternoon, whereas in spring 94% migrated in the morning (1000-1200 hr). Peak period of autumn passage was in October (65%), and in spring all observations were in February-March with the peak usually …
The Direct Autumn Release Of Whooping Cranes Into The Eastern Migratory Population: A Summary Of The First Three Years, Marianne M. Wellington, Richard P. Urbanek
The Direct Autumn Release Of Whooping Cranes Into The Eastern Migratory Population: A Summary Of The First Three Years, Marianne M. Wellington, Richard P. Urbanek
Proceedings of the North American Crane Workshop
This paper describes methods used in an experimental direct autumn release of captive produced whooping cranes (Grus americana) into a reintroduced migratory population in eastern North America. Eighteen chicks (4 in 2005, 4 in 2006, and 10 in 2007) were eventually released in the vicinity of adult whooping cranes or wild sandhill cranes (G. canadensis). Chicks were reared by costumed aviculturists using strict isolation-rearing techniques at the International Crane Foundation (ICF) and then transferred to Necedah National Wildlife Refuge in central Wisconsin. Initially, 23 chicks were transferred from ICF to Necedah at ages of 17-46 days. …
The Role Of Retrieval And Translocation In A Reintroduced Population Of Migratory Whooping Cranes, Sara E. Zimorski, Richard P. Urbanek
The Role Of Retrieval And Translocation In A Reintroduced Population Of Migratory Whooping Cranes, Sara E. Zimorski, Richard P. Urbanek
Proceedings of the North American Crane Workshop
Beginning in 2001, a reintroduction project was initiated using captive-reared whooping cranes (Grus americana) to establish a migratory flock in eastern North America. From May 2003 to August 2008, 23 of these birds were retrieved and translocated in 15 separate events. These individuals consisted of 14 cranes that had been led to Florida by ultralight aircraft on their first autumn migration (UL) and 9 cranes that had been directly released in autumn in Wisconsin (DAR). Of 104 (86 UL and 18 DAR) reintroduced individuals that eventually departed from their release location, 22% were later retrieved 1-3 times. Lake …
Investigating Raptor Migration Behavior Using Orientation Cages And Wing Measurements: A Comparison Of The Flammulated Owl And Northern Saw-Whet Owl In Southwestern Idaho, Rhonda F. Smith
Boise State University Theses and Dissertations
Flammulated Owls (Otus flammeolus) are long-distance migrants, while Northern Saw-whet Owls (Aegolius acadicus) exhibit more variable migration tendencies. I investigated the migratory behavior of these species using orientation cages and tested hypotheses concerning (1) the presence of migratory restlessness and orientation, (2) inter-specific differences in migratory restlessness and orientation, and (3) correlates of migratory restlessness and orientation. Only four of 16 Flammulated Owls displayed activity consistent with migratory restlessness although all four owls exhibited significant directionality in their movements. Alternatively, 59 of 97 Northern Saw-whet Owls exhibited activity consistent with migratory restlessness with most of these 59 owls showing preferred …
Spring Migratory Habits And Breeding Distribution Of Lesser Sandhill Cranes That Winter In West-Central New Mexico And Arizona, Gary L. Krapu, David A. Brandt
Spring Migratory Habits And Breeding Distribution Of Lesser Sandhill Cranes That Winter In West-Central New Mexico And Arizona, Gary L. Krapu, David A. Brandt
Proceedings of the North American Crane Workshop
Little information exists on the spring migratory habits and breeding distribution of lesser sandhill cranes (Grus canadensis canadensis) that winter in west-central New Mexico and southeastern Arizona. To address this question, we captured and attached a total of 6 Platform Transmitting Terminals (PTT) to adult lesser sandhill cranes at 2 sites each in west-central New Mexico and southeastern Arizona during December 2001 and monitored the birds’ movements to arrival on their arctic breeding grounds. After departing from their wintering grounds, 2 of the cranes stopped at Monte Vista NWR in south-central Colorado where they stayed for 17 and …
Behavior Comparisons For Whooping Cranes Raised By Costumedcaregivers And Trained For An Ultralight-Led Migration, Glenn H. Olsen, John B. French
Behavior Comparisons For Whooping Cranes Raised By Costumedcaregivers And Trained For An Ultralight-Led Migration, Glenn H. Olsen, John B. French
Proceedings of the North American Crane Workshop
The successful reintroduction program being run by the Whooping Crane Eastern Partnership using whooping cranes (Grus americana) trained to fly behind ultralight aircraft depends on a supply of these trained crane colts each year. The crane colts are hatched from eggs contributed by the various partners and trained to follow costume clad humans and ultralight aircraft at USGS Patuxent Wildlife Research Center, Laurel, Maryland, USA. After several seasons of raising small numbers of crane colts (7-14), we wanted to increase the number of birds being trained, but were restrained by limits in our facilities. By altering the established …
A Landscape Perspective Of Whooping Crane Migration Through Nebraska: Conservation And Management Implications, Felipe Chavez-Ramirez, Chris Helzer, Paul Tebbel
A Landscape Perspective Of Whooping Crane Migration Through Nebraska: Conservation And Management Implications, Felipe Chavez-Ramirez, Chris Helzer, Paul Tebbel
Proceedings of the North American Crane Workshop
Past and current discussions of conservation of whooping crane (Grus americana) stopover habitat in Nebraska have long been focused on the Platte River. We evaluated the distribution of whooping crane stopover sites in Nebraska in a broader context to (a) determine the distribution of whooping crane stopover sites on the Platte River relative to other landscapes and (b) use whooping migratory behavior data to systematically define and explain patterns of stopover clusters. The distribution of stopover clusters suggests rainwater basin wetlands and the Platte River may be used interchangeably by migrating whooping cranes. The Rainwater Basin and Platte River appear …
Patterns Of Habitat Use By Whooping Cranes During Migration: Summary From 1977–1999 Site Evaluation Data, Jane E. Austin, Amy L. Richert
Patterns Of Habitat Use By Whooping Cranes During Migration: Summary From 1977–1999 Site Evaluation Data, Jane E. Austin, Amy L. Richert
Proceedings of the North American Crane Workshop
We used site evaluation data collected during 1977–1999 to examine patterns of habitat use by whooping cranes (Grus americana) during migration through the United States portion of the Wood Buffalo–Aransas flyway. We examined characteristics of 3 types of stopover habitats: 1) roost sites (n = 141 records), 2) feeding sites (n = 306), and 3) dual-use sites (i.e., where observer recorded cranes as using a site for both roosting and feeding (n = 248). Results in spring were influenced by the large number of records from Nebraska (> 67% of spring records) and in fall by frequent observations …