Results 171 to 180 of about 103,701 (215)
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Journal of Ornithology, 2007
Head-bobbing is a common and characteristic behavior of walking birds. While the activity could have a relatively minor biomechanical function, for balance and stabilization of gait, head-bobbing is thought to be primarily a visual behavior in which fixation of gaze alternates with a forward movement that generates visual flow.
Thomas W. Cronin +2 more
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Head-bobbing is a common and characteristic behavior of walking birds. While the activity could have a relatively minor biomechanical function, for balance and stabilization of gait, head-bobbing is thought to be primarily a visual behavior in which fixation of gaze alternates with a forward movement that generates visual flow.
Thomas W. Cronin +2 more
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The whooping crane (Grus americana) population of North America
Biological Conservation, 1974Abstract A model of the whooping crane population of North America shows that its rate of increase has been the result of a stabilized death rate, in spite of an overall decrease in the birth rate and no significant increase in the breeding population.
Richard S. Miller +2 more
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Zoo Biology, 2020
Endangered whooping cranes (Grus americana) have been produced in captivity for reintroduction programs since the 1980s, using techniques such as artificial insemination, multiple clutching, and captive-rearing to speed recovery efforts. Chicks are often
Megan E Brown +4 more
semanticscholar +1 more source
Endangered whooping cranes (Grus americana) have been produced in captivity for reintroduction programs since the 1980s, using techniques such as artificial insemination, multiple clutching, and captive-rearing to speed recovery efforts. Chicks are often
Megan E Brown +4 more
semanticscholar +1 more source
Zoo Biology, 2007
AbstractThe enteric flora of captive whooping cranes (Grus americana) and sandhill cranes (Grus canadensis) has not been well described, despite its potential importance in the understanding of both the normal condition of the intestinal physiology of these animals and the altered colonization within disease states in these birds.
Bryanne M, Hoar +4 more
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AbstractThe enteric flora of captive whooping cranes (Grus americana) and sandhill cranes (Grus canadensis) has not been well described, despite its potential importance in the understanding of both the normal condition of the intestinal physiology of these animals and the altered colonization within disease states in these birds.
Bryanne M, Hoar +4 more
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Population characteristics of the Whooping Crane, Grus americana
Canadian Journal of Zoology, 1983The principal migratory population of Whooping Cranes is now increasing at an annual rate of about 4%, about twice the rate observed prior to the mid-1950's. Significant periodic fluctuations in total numbers overlay these average trends. These fluctuations can be explained by observed fluctuations in annual recruitment. On average, both the number of
Clark S. Binkley, Richard S. Miller
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PRESENCE OF ENCYSTED IMMATURE NEMATODES IN A RELEASED WHOOPING CRANE (GRUS AMERICANA)
Journal of Zoo and Wildlife Medicine, 2001Numerous nematode cysts were observed throughout the mesentery and on the surface of gastrointestinal organs in a whooping crane (Grus americana) that was found dead in a central Florida marsh. Morphology of the excysted nematodes most closely resembled third-stage larvae in the order Spirurida but were not similar to any species previously reported in
A, Varela, J M, Kinsella, M G, Spalding
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Journal of Wildlife Diseases, 2019
We describe a wing abnormality in a wild-hatched Whooping Crane (Grus americana) chick from the reintroduced Louisiana nonmigratory population. Despite its seemingly compromised flight ability, the chick fledged, reached independence, and lived until 13 ...
Phillip L. Vasseur +5 more
semanticscholar +1 more source
We describe a wing abnormality in a wild-hatched Whooping Crane (Grus americana) chick from the reintroduced Louisiana nonmigratory population. Despite its seemingly compromised flight ability, the chick fledged, reached independence, and lived until 13 ...
Phillip L. Vasseur +5 more
semanticscholar +1 more source
Food consumption and retention time in captive whooping cranes (Grus americana)
Zoo Biology, 1997Food consumption, digesta retention time, and food preference were measured for captive whooping cranes fed pelleted diets. The basal commercial diet was compared to four mixtures containing 70% basal and 30% of one of four important winter foods for the whooping crane: blue crab (Callinectes sapidus), wolfberry fruit (Lycium carolinianum), live oak ...
Jay T. Nelson +2 more
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Perception of Vocal Tract Resonances by Whooping Cranes Grus americana
Ethology, 2000Although formants (vocal tract resonances) can often be observed in avian vocalizations, and several bird species have been shown to perceive formants in human speech sounds, no studies have examined formant perception in birds’ own species‐specific calls.
W. Tecumseh Fitch, J. Patrick Kelley
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Whooping Crane (Grus americana) Nest Attentiveness, Desertion and Management Intervention
Waterbirds, 2013Abstract. Recovery of endangered birds often involves population establishment through introduction of captive-reared individuals. Growth of a captive-reared Whooping Crane (Grus americana) population introduced into central Wisconsin is currently limited by a high rate of nest desertion, which is thought to possibly be related to poor general nest ...
Richard S. King +5 more
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