Results 11 to 20 of about 78,377 (265)
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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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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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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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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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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The Critical Role of Head Movements for Spatial Representation During Bumblebees Learning Flight
Frontiers in Behavioral Neuroscience, 2021 Bumblebees perform complex flight maneuvers around the barely visible entrance of their nest upon their first departures. During these flights bees learn visual information about the surroundings, possibly including its spatial layout.
Charlotte Doussot +2 more
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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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Flight Zone as an Alternative Temperament Assessment to Predict Animal Efficiency
Proceedings, 2020 Animal temperament evaluation can be included in the cattle selection program also because of an existing correlation with performance. However, there are different assessment methods such as flight speed (time and speed that an animal takes to leave the
Mariano Parra +8 more
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The EMBO Reports, 2007 Since the dawn of civilization, humans have envied their feathery companions for their ability to leap from the earth, escape gravity—and all earthly problems—and ascend to the skies. Of course, humans eventually made it into the skies too, albeit after a few millennia and rather inelegantly with the help of technology.
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Wolf Responses to Experimental Human Approaches Using High-Resolution Positioning Data
Frontiers in Ecology and Evolution, 2022 Humans pose a major mortality risk to wolves. Hence, similar to how prey respond to predators, wolves can be expected to show anti-predator responses to humans. When exposed to a threat, animals may show a fight, flight, freeze or hide response. The type
Erik Versluijs +6 more
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