Butterflies fly using efficient propulsive clap mechanism owing to flexible wings
, 2021 Butterflies look like no other flying animal, with unusually short, broad and large wings relative to their body size. Previous studies have suggested butterflies use several unsteady aerodynamic mechanisms to boost force production with upstroke wing ...
L. C. Johansson +3 more
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Giant ants and their shape: revealing relationships in the genus Titanomyrma with geometric morphometrics [PDF]
PeerJ, 2018 Shape is a natural phenomenon inherent to many different lifeforms. A modern technique to analyse shape is geometric morphometrics (GM), which offers a whole range of methods concerning the pure shape of an object.
Julian Katzke +4 more
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Flappy Hummingbird: An Open Source Dynamic Simulation of Flapping Wing Robots and Animals [PDF]
2019 International Conference on Robotics and Automation (ICRA), 2019 Insects and hummingbirds exhibit extraordinary flight capabilities and can simultaneously master seemingly conflicting goals: stable hovering and aggressive maneuvering, unmatched by small scale man-made vehicles. Flapping Wing Micro Air Vehicles (FWMAVs) hold great promise for closing this performance gap.
Fan Fei 0002 +4 more
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First evidence of marine turtle gastroliths in a fossil specimen: Paleobiological implications in comparison to modern analogues [PDF]
Semi-articulated remains of a large chelonioid turtle from the Turonian strata (Upper Cretaceous; ca. 93.9–89.8 Myr) near Sant’Anna d’Alfaedo (Verona province, northeastern Italy) are described for the first time. Together with the skeletal elements, the
Gordon C. +6 more
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Oxidative Stability of Vacuum-Packed Chicken Wings Marinated with Fruit Juices during Frozen Storage
, 2022 Antioxidants present in fruits and vegetables have a potential to reduce disease risk, and increase the shelf life of food products by reducing lipid oxidation.
Alakolanga, Achala W. +4 more
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Journal of Basic and Applied Zoology, 2019 Background Insect wings are an excessively diverse structures, which have fascinated scientist for centuries. Coleoptera is the largest order in the insect group and the most successful animal on earth (Nature Communications 9(205):1–11, 2018).
Nasra M.H. Zohry, Ahmed Mohamed El-Sayed
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Animal Communication: Keep Your Wings Off My Food! [PDF]
Current Biology, 2014 When foraging, male big brown bats produce ultrasonic social calls. The calls repel rival bats from the caller and its prey, and increase the caller's foraging success during their high-speed aerial excursions.
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Power reduction and the radial limit of stall delay in revolving wings of different aspect ratio
, 2015 Airplanes and helicopters use high aspect ratio wings to reduce the power required to fly, but must operate at low angle of attack to prevent flow separation and stall. Animals capable of slow sustained flight, such as hummingbirds, have low aspect ratio
van Heijst, G.-J. +7 more
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Butterfly Eyespots: Their Potential Influence on Aesthetic Preferences and Conservation Attitudes. [PDF]
PLoS ONE, 2015 Research has shown that the mere presence of stimuli that resemble eyes is sufficient to attract attention, elicit aesthetic responses, and can even enhance prosocial behavior.
Zoi Manesi +2 more
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Digital particle image velocimetry measurements of the downwash distribution of a desert locust Schistocerca gregaria [PDF]
, 2006 Actuator disc models of insect flight are concerned solely with the rate of momentum transfer to the air that passes through the disc. These simple models assume that an even pressure is applied across the disc, resulting in a uniform downwash ...
Taylor, Graham K. +8 more
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