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Mud-puddling
Insect feeding behaviour / From Wikipedia, the free encyclopedia
Mud-puddling, or simply puddling, is a behaviour most conspicuous in butterflies, but also occurring in other animals, primarily insects. The organism seeks out nutrients in certain moist substances such as rotting plant matter, mud, and carrion, and sucks up the fluid. Where the conditions are suitable, conspicuous insects such as butterflies commonly form aggregations on wet soil, dung, or carrion.[1] From the fluids they obtain salts and amino acids that play various roles in their physiology, ethology, and ecology.[2][3] This behaviour also has been seen in some other insects like the leafhoppers, e.g. the potato leafhopper, Empoasca fabae.[4]
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Lepidoptera (butterflies and moths) are diverse in their strategies to gather liquid nutrients. Typically, mud-puddling behaviour takes place on wet soil. But even sweat on human skin may be attractive to butterflies such as species of Halpe.[5][6] More unusual sources include blood and tears. Again, similar behaviour is not limited to the Lepidoptera; for example, the various species of bees commonly called sweat bees are attracted to various kinds of sweat and tears, including that of humans, and other bee species have been recorded as doing so to various degrees.[7][8]
In many species, puddling behaviour is more commonly seen in males. For example, Speyeria mormonia males puddle with a much higher frequency than females.[9] The presence of an assembly of butterflies on the ground acts on Battus philenor, for example, as a stimulus to join the presumptive mud-puddling flock.[1]