Results 11 to 20 of about 358,216 (305)
A dynamics and stability framework for avian jumping take-off [PDF]
Royal Society Open Science, 2018 Jumping take-off in birds is an explosive behaviour with the goal of providing a rapid transition from ground to airborne locomotion. An effective jump is predicated on the need to maintain dynamic stability through the acceleration phase.
Ben Parslew +2 more
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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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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
doaj +1 more source
Resolution of a paradox: Hummingbird flight at high elevation does not come without a cost [PDF]
, 2004 Flight at high elevation is energetically demanding because of parallel reductions in air density and oxygen availability. The hovering flight of hummingbirds is one of the most energetically expensive forms of animal locomotion, but hummingbirds are ...
Altshuler, Douglas L. +2 more
core +3 more sources
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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Take-off mechanics in hummingbirds (Trochilidae) [PDF]
, 2004 Initiating flight is challenging, and considerable effort has focused on understanding the energetics and aerodynamics of take-off for both machines and animals.
Altshuler, Douglas L. +2 more
core +2 more sources
Flocking together : collective animal minds in contemporary fiction [PDF]
, 2020 The remarkable coordination displayed by animal groups such as an ant colony or a flock of birds in flight is not just a behavioral feat; it reflects a full-fledged form of collective cognition.
Caracciolo, Marco
core +2 more sources