butterflies love mud. It is the same all over the world. I took this photo on light forest road covered by almost dried-up puddles. You can see the humidity under the butterfly.
http://www.learnaboutbutterflies.com/Britain%20-%20Argynnis%20paphia.htm
Milovice, Czech republic, Sunday 25.6.2017
Pentax K50 f 8; 1/400 sec; ISO 200; lens zoom 4,5-6,3/55-300 mm
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From @valtr