Results 71 to 80 of about 119 (105)
Some of the next articles are maybe not open access.
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
openaire +1 more source
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
openaire +1 more source
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
openaire +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
openaire +2 more sources
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
openaire +2 more sources
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
openaire +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
openaire +1 more source
Effects of rearing treatment on the behavior of captive whooping cranes (Grus americana)
Applied Animal Behaviour Science, 2004Abstract Small founder populations of whooping cranes are managed to maximize egg production for the purpose of reintroducing young to the wild. This results in an excessive number of hatched chicks that cannot be naturally reared by parents. Hand-rearing techniques have been developed to raise the additional hatches.
Michael D. Kreger +3 more
openaire +1 more source
The effects of captive rearing on the behavior of newly-released whooping cranes (Grus americana)
Applied Animal Behaviour Science, 2005Abstract Rearing treatments used in captivity to prepare animals for reintroduction to the wild may have a profound effect on behavior and, possibly, affect their survival after reintroduction. This study examined the behaviors of captive-reared whooping cranes ( Grus americana ) upon their release in Florida to determine if rearing treatments may ...
Michael D. Kreger +4 more
openaire +1 more source
Hamilton Mack Laing's specimen of a whooping crane, Grus americana
Archives of Natural History, 2021Hamilton Mack Laing, a hunter-naturalist, taught in rural schools in southwestern Manitoba, Canada, from 1901 to 1911. He collected a whooping crane ( Grus americana) near Whitewater Lake in 1905, which he later regretted when the species's decline and rarity were becoming recognized.
openaire +1 more source
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
openaire +1 more source
Veterinary Ophthalmology
AbstractObjectiveTo assess intraocular pressure (IOP) development in cranes and determine the impact of age, weight, species, head position, and sex.Animals StudiedWhooping cranes (WC) (Grus americana), and Mississippi‐sandhill cranes (MSC) (Grus canadensis pulla).ProceduresChicks were manually restrained on days 1–3, 7, 21, 35, 60, 75, and 120 for ...
Rodrigo S. Garcés Torres +5 more
openaire +2 more sources
AbstractObjectiveTo assess intraocular pressure (IOP) development in cranes and determine the impact of age, weight, species, head position, and sex.Animals StudiedWhooping cranes (WC) (Grus americana), and Mississippi‐sandhill cranes (MSC) (Grus canadensis pulla).ProceduresChicks were manually restrained on days 1–3, 7, 21, 35, 60, 75, and 120 for ...
Rodrigo S. Garcés Torres +5 more
openaire +2 more sources