Results 11 to 20 of about 76,052 (267)
Humming hummingbirds, insect flight tones, and a model of animal flight sound [PDF]
Journal of Experimental Biology, 2020 Why do hummingbirds hum and insects whine when their wings flap in flight? Gutin proposed that a spinning propeller produces tonal sound because the location of the center of aerodynamic pressure on each blade oscillates relative to an external receiver.
Christopher J. Clark, Emily A. Mistick
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FMRFa receptor stimulated Ca2+ signals alter the activity of flight modulating central dopaminergic neurons in Drosophila melanogaster. [PDF]
PLoS Genetics, 2018 Neuropeptide signaling influences animal behavior by modulating neuronal activity and thus altering circuit dynamics. Insect flight is a key innate behavior that very likely requires robust neuromodulation.
Preethi Ravi +2 more
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Hovering hummingbird wing aerodynamics during the annual cycle. II. Implications of wing feather moult [PDF]
Royal Society Open Science, 2018 Birds usually moult their feathers in a particular sequence which may incur aerodynamic, physiological and behavioural implications. Among birds, hummingbirds are unique species in their sustained hovering flight.
Yonathan Achache +2 more
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A new low-turbulence wind tunnel for animal and small vehicle flight experiments [PDF]
Royal Society Open Science, 2017 Our understanding of animal flight benefits greatly from specialized wind tunnels designed for flying animals. Existing facilities can simulate laminar flow during straight, ascending and descending flight, as well as at different altitudes. However, the
Daniel B. Quinn +3 more
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Animal Flight Dynamics I. Stability in Gliding Flight
Journal of Theoretical Biology, 2001 Stability is as essential to flying as lift itself, but previous discussions of how flying animals maintain stability have been limited in both number and scope. By developing the pitching moment equations for gliding animals and by discussing potential sources of roll and yaw stability, we consider the various sources of static stability used by ...
Thomas, A, Taylor, G
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Frontiers in Computational Neuroscience, 2022 The mouse ventromedial hypothalamus (VMH) is both necessary and sufficient for defensive responses to predator and social threats. Defensive behaviors typically involve cautious approach toward potentially threatening stimuli aimed at obtaining ...
Ryan Rahy +2 more
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Animal Flight Dynamics II. Longitudinal Stability in Flapping Flight
Journal of Theoretical Biology, 2002 Stability is essential to flying and is usually assumed to be especially problematic in flapping flight. If so, problems of stability may have presented a particular hurdle to the evolution of flapping flight. In spite of this, the stability of flapping flight has never been properly analysed.
Taylor, G, Thomas, A
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Beyond robins: aerodynamic analyses of animal flight [PDF]
Journal of The Royal Society Interface, 2008 Recent progress in studies of animal flight mechanics is reviewed. A range of birds, and now bats, has been studied in wind tunnel facilities, revealing an array of wake patterns caused by the beating wings and also by the drag on the body. Nevertheless, the quantitative analysis of these complex wake structures shows a degree of similarity among all ...
Anders, Hedenström, Geoffrey, Spedding
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Lab-animal flights squeezed [PDF]
Nature, 2012 Two biggest cargo carriers affirm that they will not ship mammals and non-human primates, as activist pressure mounts to stop research-animal airlifts.
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Feather moult and bird appearance are correlated with global warming over the last 200 years
Nature Communications, 2019 Most passerine bird species replace part of their plumage within the first year of life. Here, using data from 4,012 individuals of 19 species, Kiat et al.
Y. Kiat, Y. Vortman, N. Sapir
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