Results 21 to 30 of about 82,446 (310)

Controllable factors affecting accuracy and precision of human identification of animals from drone imagery

open access: yesEcosphere, 2023
Surveying animal populations using drones (unoccupied aircraft systems [UAS]) provides numerous advantages; however, few best practices exist to survey animal communities with drones.
Landon R. Jones   +7 more
doaj   +1 more source

Wing Design in Flies: Properties and Aerodynamic Function

open access: yesInsects, 2020
The shape and function of insect wings tremendously vary between insect species. This review is engaged in how wing design determines the aerodynamic mechanisms with which wings produce an air momentum for body weight support and flight control.
Swathi Krishna   +4 more
doaj   +1 more source

A dynamics and stability framework for avian jumping take-off [PDF]

open access: yesRoyal 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
doaj   +1 more source

FMRFa receptor stimulated Ca2+ signals alter the activity of flight modulating central dopaminergic neurons in Drosophila melanogaster. [PDF]

open access: yesPLoS 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

Humming hummingbirds, insect flight tones, and a model of animal flight sound [PDF]

open access: yesJournal 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
openaire   +2 more sources

Hovering hummingbird wing aerodynamics during the annual cycle. II. Implications of wing feather moult [PDF]

open access: yesRoyal 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
doaj   +1 more source

Animal Flight Dynamics I. Stability in Gliding Flight

open access: yesJournal 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
openaire   +2 more sources

Sensory-thresholded switch of neural firing states in a computational model of the ventromedial hypothalamus

open access: yesFrontiers 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
doaj   +1 more source

Electrocardiogram recordings in free-ranging gannets reveal minimum difference in heart rate during flapping versus gliding flight [PDF]

open access: yes, 2006
Gliding flight is one of the major features that allows flying animals to cover extensive distances while minimising their energy expenditures. This has been supported by studies recording heart rate as a proxy for energy expended, but the exact amount ...
Ryan, Peter G.   +11 more
core   +1 more source

The Critical Role of Head Movements for Spatial Representation During Bumblebees Learning Flight

open access: yesFrontiers 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
doaj   +1 more source

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