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To restore the insect to its original vertical position, the average upward force during the downward stroke, F av, must be equal to twice the weight of the insect. Note that since the upward force on the insect body is applied only for half the time, the average upward force on the insect is simply its weight. [14]
Robert Todd Carroll (2003), having consulted an entomologist (Doug Yanega), identified rods as images of flying insects recorded over several cycles of wing-beating on video recording devices. The insect captured on image a number of times, while propelling itself forward, gives the illusion of a single elongated rod-like body, with bulges.
Some species, including the dragonhunter (Hagenius brevistylus), reduce exposure to the sun by perching with the abdomen pointed downward, rather than upward. The tropical skimmer dragonfly Diastatops intensa , whose wings are mostly black, points its wings rather than its abdomen at the sun, apparently to reduce the heat they absorb.
The majority of insects have two pairs of wings. Flies possess only one set of lift-generating wings and one set of halteres. The order name for flies, "Diptera", literally means "two wings", but there is another order of insect which has evolved flight with only two wings: strepsipterans, or stylops; [2] they are the only other organisms that possess two wings and two halteres. [6]
Positive phototaxis can be found in many flying insects such as moths, grasshoppers, and flies. Drosophila melanogaster has been studied extensively for its innate positive phototactic response to light sources, using controlled experiments to help understand the connection between airborne locomotion toward a light source. [65]
Like most insects, the Lepidoptera are oviparous or "egg layers". [40] Lepidopteran eggs, like those of other insects, are centrolecithal in that the eggs have a central yolk surrounded by cytoplasm. The yolk provides the liquid nourishment for the embryo caterpillar until it escapes from the shell. [60]
“A flying eagle may be showing you that it’s time to rise to a higher perspective, to get beyond your own limited beliefs and thoughts and consider the issue at hand from other points of view ...
A grey heron in delta-wing posture, facing the Sun. Sunning or basking, sometimes also known as sunbathing, is a thermoregulatory or comfort behaviour used by humans, animals, especially birds, reptiles, and insects, to help raise their body temperature, reduce the energy needed for temperature maintenance or to provide comfort.